{"id":132151,"date":"2020-08-09T11:55:53","date_gmt":"2020-08-09T15:55:53","guid":{"rendered":"https:\/\/www.gunsamerica.com\/digest\/?p=132151"},"modified":"2026-10-18T14:13:55","modified_gmt":"2026-10-18T19:13:55","slug":"a-simple-method-of-bluing-you-can-do-at-home","status":"publish","type":"post","link":"https:\/\/gunsamerica.com\/digest\/a-simple-method-of-bluing-you-can-do-at-home\/","title":{"rendered":"How to Blue a Gun at Home: Express Rust Bluing Steps"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>To blue a gun at home, strip it to bare steel parts, polish or blast them, degrease them in hot soapy water, then run express rust bluing cycles: boil, apply the solution, repeat, boil 10 minutes, and card off the rust.<\/strong> Three cycles is the minimum, and more cycles get a darker color. Finish by soaking the parts in water displacing oil and letting them sit a day.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Christopher Mace used this method to blue a Sten Mk. V barrel with metal serving trays for tanks. It works only on carbon steel, not stainless or aluminum. The quick steps and a method comparison are first, then his full walkthrough.<\/p>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#h-home-gun-bluing-methods-compared\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Home Gun Bluing Methods Compared<\/a><ul><li><a href=\"#h-what-you-need\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">What You Need<\/a><\/li><li><a href=\"#h-express-rust-bluing-steps\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">Express Rust Bluing Steps<\/a><\/li><\/ul><\/li><li><a href=\"#h-why-rust-bluing-for-a-home-build\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Why Rust Bluing for a Home Build<\/a><\/li><li><a href=\"#h-rust-bluing-vs-express-rust-bluing\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Rust Bluing vs Express Rust Bluing<\/a><\/li><li><a href=\"#h-advantages-and-limits-of-express-rust-bluing\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Advantages and Limits of Express Rust Bluing<\/a><\/li><li><a href=\"#h-equipment-for-express-rust-bluing\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Equipment for Express Rust Bluing<\/a><\/li><li><a href=\"#h-bluing-safety\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Bluing Safety<\/a><\/li><li><a href=\"#h-step-1-surface-prep\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Step 1: Surface Prep<\/a><\/li><li><a href=\"#h-step-2-degreasing-and-the-cleaning-cycle\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Step 2: Degreasing and the Cleaning Cycle<\/a><\/li><li><a href=\"#h-step-3-boil-apply-card\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Step 3: Boil, Apply, Card<\/a><\/li><li><a href=\"#h-carding-tips\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Carding Tips<\/a><\/li><li><a href=\"#h-step-4-oil-and-cure\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Step 4: Oil and Cure<\/a><\/li><li><a href=\"#h-is-home-bluing-worth-it\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">Is Home Bluing Worth It?<\/a><\/li><li><a href=\"#h-faq\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"2\">FAQ<\/a><ul><li><a href=\"#h-can-you-blue-a-gun-at-home\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">Can you blue a gun at home?<\/a><\/li><li><a href=\"#h-can-you-blue-stainless-steel-or-aluminum\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">Can you blue stainless steel or aluminum?<\/a><\/li><li><a href=\"#h-how-many-bluing-cycles-do-you-need\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">How many bluing cycles do you need?<\/a><\/li><li><a href=\"#h-is-cold-bluing-good-enough-for-a-whole-gun\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">Is cold bluing good enough for a whole gun?<\/a><\/li><li><a href=\"#h-should-you-plug-the-barrel-when-bluing\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\" data-level=\"3\">Should you plug the barrel when bluing?<\/a><\/li><\/ul><\/li><\/ul><\/div>\n\n\n\n<h2 id=\"h-home-gun-bluing-methods-compared\" class=\"wp-block-heading\">Home Gun Bluing Methods Compared<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Method<\/th><th>Gear and space<\/th><th>Time<\/th><th>Best for<\/th><\/tr><\/thead><tbody><tr><td>Cold bluing<\/td><td>Bottle of solution, rags<\/td><td>Minutes<\/td><td>Touch up work, not a whole gun<\/td><\/tr><tr><td>Traditional rust bluing<\/td><td>Rusting solution, carding tools<\/td><td>Days or weeks<\/td><td>Classic finish if you have patience<\/td><\/tr><tr><td>Express rust bluing<\/td><td>Steel tank, heat source, solution, carding wheel or brush<\/td><td>An afternoon once parts are prepped<\/td><td>Hobbyists bluing a whole gun at home<\/td><\/tr><tr><td>Hot salt bluing<\/td><td>Multiple tanks, bluing salts, lots of room<\/td><td>Production speed<\/td><td>Shops with equipment; more hazardous<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"h-what-you-need\" class=\"wp-block-heading\">What You Need<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A steel tank or pot big enough for the parts (never aluminum)<\/li>\n<li>Water and a heat source that can hold a boil<\/li>\n<li>Express rust bluing solution<\/li>\n<li>Carding wheel rated for your motor speed, plus a carding brush<\/li>\n<li>Extra fine steel wool, degreased, for tight spots<\/li>\n<li>Dawn dish soap or another degreaser, and acetone<\/li>\n<li>Latex or rubber gloves and eye protection<\/li>\n<li>Water displacing oil such as WD-40<\/li>\n<\/ul>\n\n\n\n<h3 id=\"h-express-rust-bluing-steps\" class=\"wp-block-heading\">Express Rust Bluing Steps<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Disassemble the gun completely and confirm each part is carbon steel with a magnet.<\/li>\n<li>Prep the surface: blast with aluminum oxide for a dull military finish, or polish for shine.<\/li>\n<li>Degrease in Dawn and water at about 150 to 180 degrees F for 10 minutes, then rinse.<\/li>\n<li>Boil the parts 2 to 3 minutes, apply the bluing solution, and repeat until you have applied it three times.<\/li>\n<li>Boil 10 minutes, let the parts cool, then card off the rust. That is one cycle.<\/li>\n<li>Run at least three cycles, more for a darker color. Heat parts with lots of recesses to 212 degrees F with a torch after the final boil to drive out water.<\/li>\n<li>Coat or dunk the parts in water displacing oil and let them sit a day before reassembly.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">If you want a gray military finish instead, see our guide to <a href=\"https:\/\/gunsamerica.com\/digest\/parkerizing-at-home\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\">parkerizing a gun at home<\/a>. For other DIY finishes, read our <a href=\"https:\/\/gunsamerica.com\/digest\/add-touch-class-niter-blue-di\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\">niter bluing DIY<\/a> piece and our <a href=\"https:\/\/gunsamerica.com\/digest\/easy-diy-gun-refinishing-step-step-review-duracoat-aerosol\/\" target=\"_blank\" class=\"clickTracking\" campaign=\"a-simple-method-of-bluing-you-can-do-at-home\" title=\"How to Blue a Gun at Home: Express Rust Bluing Steps\">DuraCoat aerosol refinishing review<\/a>.<\/p>\n\n\n\n<h2 id=\"h-why-rust-bluing-for-a-home-build\" class=\"wp-block-heading\">Why Rust Bluing for a Home Build<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As homebuilders, we all eventually come to the same point in a build, no matter what the build is; \u201cOk, it works. Now, what do I do for finishing?\u201d These days there are quite a few options out there for firearm finishes. A lot of these are suitable for us DIY types. But, there are some guns that the modern spray-on finishes just do not look right on. Previously, I wrote an article on Parkerizing. But again, there are some guns that Parkerizing wouldn\u2019t be an appropriate finish for either. Or maybe you just like the look of a nice blued finish on your firearms. This article is for just such occasions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When we refer to bluing, we typically think of the hot salt bluing that is usually done. This process requires a lot of equipment that takes up a lot of space, and the process itself can be somewhat hazardous. Obviously, this doesn\u2019t easily lend itself to the hobbyist homebuilder or \u201ckitchen table gunsmith\u201d. There are cold bluing solutions available as well. There are some that you can realistically do a bit more than just touch up work with. But even so, these are not really intended for bluing a whole firearm.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-1024x681.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132152\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-1024x681.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-400x266.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-150x100.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-768x511.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-1536x1021.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Unfinished-Barrel-2048x1362.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Here is the start of the project: a bare steel, Sten Mk. V barrel<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-rust-bluing-vs-express-rust-bluing\" class=\"wp-block-heading\">Rust Bluing vs Express Rust Bluing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">That brings us to rust bluing. This is the oldest way to blue a gun. Basically, a chemical rusting agent is applied to the steel, time passes, and rust forms. The rust is \u201cpolished off\u201d. The steel has changed color slightly in this process, and the process is repeated until the steel is the desired color. The problem with this process is that it takes a REALLY long time. We literally are talking days or even weeks to complete. Fortunately, there is a similar but much faster process, Express Rust Bluing. As its name implies, Express Rust Bluing speeds up this whole process significantly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Express Rust Bluing is faster than rust bluing because rather than allowing the chemical reaction to happen \u201cnaturally\u201d the process is expedited by boiling the parts. So instead of having to wait for the parts to rust for a couple of days, you actually force them to form rust in a few minutes. This takes the process down to something you can do in an afternoon (as long as the parts are already prepped).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Some of the more astute of you reading this probably read the previous paragraph and went, \u201cWait, I\u2019m supposed to allow it to rust?!\u201d You would be correct. Red rust is mostly iron oxide in the form Fe2O3. Bluing is a different, black iron oxide called magnetite, Fe3O4, and the process converts the red rust into that tougher black layer. This conversion happens as part of the chemical reaction to the rusting agent in the boiling tank. I\u2019m not a chemist by any means, so I\u2019m sure there\u2019s a lot more to it than that. But I think you can get the gist.<\/p>\n\n\n\n<h2 id=\"h-advantages-and-limits-of-express-rust-bluing\" class=\"wp-block-heading\">Advantages and Limits of Express Rust Bluing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For the hobbyist, there are a lot of advantages to this process. You don\u2019t need a whole lot of equipment, or space. The chemical used is also fairly safe, especially in comparison to bluing salts. Express Rust Bluing is actually preferable on some types of firearms due to their construction because you have control where the bluing formula goes (and hence make sure it all comes back out again). It also doesn\u2019t subject the parts to as much heat as hot salt bluing does. You end up with a very durable, high quality, blued finish. A lot of the bluing done on high end firearms is Express Rust Bluing. You can also \u201crepair\u201d damaged areas in already blued parts with this method as well.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"535\" height=\"1024\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-535x1024.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132153\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-535x1024.jpg 535w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-157x300.jpg 157w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-78x150.jpg 78w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-768x1470.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-803x1536.jpg 803w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-1070x2048.jpg 1070w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Bluing-Formula-scaled.jpg 1338w\" sizes=\"(max-width: 535px) 100vw, 535px\" \/><figcaption>This is the bluing formula I used for this project.<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Like anything, there are some limitations to this process. You must be able to completely disassemble (not just field strip) the firearm you want to blue. Obviously, this process (though these rules apply to bluing in general) only works on metal parts. Also, Express Rust Bluing only works on steel. It will not work on stainless, aluminum, or other metals. In fact, trying to blue aluminum WILL result in disaster. Damage or destruction of your part and your bluing \u201ctank\u201d will be ruined. So if you are unsure of what metal your part is made from, check it with a magnet. If it sticks, you\u2019re safe. While there are some stainless steels that are magnetic, the worst they will do is not blue. Lastly, any welded areas or spots will probably not blue evenly with the rest of the surface.<\/p>\n\n\n\n<h2 id=\"h-equipment-for-express-rust-bluing\" class=\"wp-block-heading\">Equipment for Express Rust Bluing<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">As I mentioned, you don\u2019t need very much for equipment relatively speaking. You need a steel container big enough to hold the parts you want to blue, though you can work around that to a degree. At this time, my \u201ctanks\u201d are metal serving trays from a restaurant supply store. If you just want to blue handguns, you can even use an old pot (so long as it\u2019s not aluminum). I have found that I could blue parts longer than would fit in my \u201ctanks\u201d with Express Rust Bluing as well, barrels for example. Obviously the part will hang out of the tank. But as long as you can re-orient the part to where it covers all of what was hanging out before, then this process will allow you to blue it. Obviously, you also need water and a heat source capable of boiling the water in whatever size container you want to use. You\u2019ll need a carding wheel or brush, both being preferable. You need some kind of degreaser for the cleaning cycle. Depending upon what you\u2019re specifically trying to blue, you may be able to just thoroughly clean the part with acetone. I use a heated solution of plain Dawn dish soap, which I will describe later. You\u2019ll need the bluing formula itself. You\u2019ll need some latex or rubber gloves so you can handle the parts without contaminating them with skin oils. Lastly, you\u2019ll need some kind of water displacing oil. I use WD-40 for this because it\u2019s readily available, but there are obviously other options for this if you prefer something else.<\/p>\n\n\n\n<h2 id=\"h-bluing-safety\" class=\"wp-block-heading\">Bluing Safety<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Now before we proceed, I should say a few words on safety. Always wear eye protection when performing the tasks described. Follow the instructions regarding the handling of the bluing formula. Read the safety portions of that BEFORE you begin, so if you have an accident you\u2019ll already know what to do. Obviously, boiling the parts means you\u2019ll be dealing with hot things. Also, this may come as a surprise but you should NOT plug your barrel when doing any kind of hot bluing. The heat from boiling will cause the air trapped in the bore to blow out the plugs. Obviously, this is not agreeable with it submerged in a tank full of hot liquid! Common sense needs to apply here. With that said, on to bluing!<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"694\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-1024x694.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132154\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-1024x694.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-400x271.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-150x102.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-768x521.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-1536x1042.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Cleaning-Tank-2048x1389.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>A heated cleaning cycle is preferable to make sure the parts are completely free of oil.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-step-1-surface-prep\" class=\"wp-block-heading\">Step 1: Surface Prep<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The first, and arguably most important, step to getting a nice blued finish is the prep work. What you do for prep work really depends on what kind of finish you\u2019re after. If you want a dull blue finish (like military arms have when they\u2019re blued) then you can just sandblast with aluminum oxide and proceed. If you want something shinier, you\u2019ll need to do some polishing. How much depends on how shiny you want the surface to be. But there is a trade off here: the more dull the finish, the more durable&#8230; the shinier, the less durable. Also, keep in mind that bluing (or any finish for that matter) will not hide flaws in the metal surface. If anything, it\u2019ll make them stand out more. So do your prep work accordingly.<\/p>\n\n\n\n<h2 id=\"h-step-2-degreasing-and-the-cleaning-cycle\" class=\"wp-block-heading\">Step 2: Degreasing and the Cleaning Cycle<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Next comes degreasing. Unless the parts you\u2019re wanting to blue are pretty clean already, then you should clean them before the actual cleaning cycle. The cleaning cycle is to remove every bit of oil on the part, as even just the skin oils from your bare hands will ruin the finish. There are various solvents that you can use for this. I use Dawn dish soap and water because it\u2019s cheap and readily available. A heated cleaning cycle works better, so that\u2019s what I recommend you do. Basically, you want the cleaning cycle to be somewhere around 150-180 degrees. Hot but not boiling. Keep them in the tank for about 10 minutes. Once you\u2019ve done cleaning, you can get rid of the solution as it\u2019s best to use a fresh cleaner for each bluing session. If you only have one tank, you\u2019ll obviously have to do this to proceed anyway.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"731\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-1024x731.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132155\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-1024x731.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-400x286.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-150x107.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-768x549.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-1536x1097.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Boiling-Parts-2048x1463.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Here are the parts being boiled. You can get away with bluing parts that don\u2019t fit all the way in the tank if you can make sure the portion outside of the tank is completely submerged when you rotate it.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-step-3-boil-apply-card\" class=\"wp-block-heading\">Step 3: Boil, Apply, Card<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After the cleaning cycle, rinse the parts off to remove any residual soap. Then put the parts in the tank to boil. This is where Express Rust Bluing gets a bit repetitive. Boil the parts for 2-3 minutes. Then apply the bluing formula. Then boil the parts for 2-3 minutes again, and so on until after the 3<sup>rd<\/sup> time you apply the bluing formula. Then boil the parts for 10 minutes, take them out and let them cool off. They\u2019ll be nice and rusty at this point. Then polish the parts with the carding wheel and\/or brush. That\u2019s one bluing cycle. You need to do at least 3 cycles. You may want to do more to reach the color you want, and that\u2019s perfectly fine. If you have parts with a bunch of nooks and crannies, you should heat the parts with a propane torch to 212 degrees after the final boil to ensure that all of the water is completely out.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"902\" height=\"1024\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-902x1024.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132156\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-902x1024.jpg 902w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-264x300.jpg 264w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-132x150.jpg 132w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-768x872.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-1352x1536.jpg 1352w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Before-Carding-1803x2048.jpg 1803w\" sizes=\"(max-width: 902px) 100vw, 902px\" \/><figcaption>This is what the part will look like before you card it the first time.<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"496\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-1024x496.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132157\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-1024x496.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-400x194.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-150x73.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-768x372.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-1536x744.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-First-Cycle-2048x992.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>This is what it looks like after the first bluing cycle. It\u2019s darker than when I started, but still a ways to go.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-carding-tips\" class=\"wp-block-heading\">Carding Tips<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">I should mention a few things about carding to be aware of. If you wish to use a carding wheel, they are typically not rated for more than 2000 RPM. So you probably can\u2019t just throw one on your bench grinder. You also can\u2019t substitute a carding wheel for a regular wire wheel, it\u2019ll just take the bluing completely off and ruin your work. Also, I recommend having a carding brush as well. I find that there are some little spots that you just can\u2019t reach with a carding wheel. A brush helps reach those. And then for the REALLY tight spots, have some extra fine grade steel wool (make sure you degrease it) on hand.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"477\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-1024x477.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132158\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-1024x477.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-400x186.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-150x70.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-768x357.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-1536x715.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/After-Final-Carding-2048x953.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Here is the barrel after the 3<sup>rd<\/sup> cycle and final carding. Quite a difference!<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-step-4-oil-and-cure\" class=\"wp-block-heading\">Step 4: Oil and Cure<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After you have completed enough bluing cycles to get the color you\u2019re after, then coat (or preferably dunk) your parts in water displacing oil. Again, I use WD-40 for this because it\u2019s cheap and available. This is both to get any remaining moisture out and to protect the now-completely-oil-free part. Then let the parts sit for a day. After that, you can typically re-assemble your firearm. I say typically because if you\u2019re like me, the next day you\u2019ll find a spot that you missed or something will look splotchy. That\u2019s where this process is really nice. Because all you have to do is go through cleaning, and a bluing cycle or two, and you\u2019ll clean those areas right up.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"289\" title=\"A Simple Method of Bluing You Can Do At Home\" src=\"https:\/\/www.gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-1024x289.jpg\" alt=\"A Simple Method of Bluing You Can Do At Home\" class=\"wp-image-132159\" srcset=\"https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-1024x289.jpg 1024w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-400x113.jpg 400w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-150x42.jpg 150w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-768x216.jpg 768w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-1536x433.jpg 1536w, https:\/\/gunsamerica.com\/digest\/wp-content\/uploads\/2020\/08\/Finished-Barrels-2048x577.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption>Here is the finished product. I did that longer barrel to illustrate how to work around having a small tank. It came out great, with no uneven spots.<\/figcaption><\/figure>\n\n\n\n<h2 id=\"h-is-home-bluing-worth-it\" class=\"wp-block-heading\">Is Home Bluing Worth It?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Express Rust Bluing is a good way for a hobbyist to blue their firearms at home. It does not require a whole lot of equipment and isn\u2019t very difficult to do. If you\u2019re doing smaller parts, you can even use old pots or pans for tanks. One bottle of the solution will last you through a bunch of bluing sessions. So really the process is pretty inexpensive. Cheap, minimal equipment, and simple are three terms that homebuilders like to hear. Express Rust Bluing offers hobbyists a way to finish firearms that all three terms apply to. Until next time, Happy Building!<\/p>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<h3 id=\"h-can-you-blue-a-gun-at-home\" class=\"wp-block-heading\">Can you blue a gun at home?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Yes. Express rust bluing needs only a steel tank, a heat source, bluing solution and carding tools, and you can finish a gun in an afternoon once the parts are prepped.<\/p>\n\n\n\n<h3 id=\"h-can-you-blue-stainless-steel-or-aluminum\" class=\"wp-block-heading\">Can you blue stainless steel or aluminum?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Not with this method. It works only on carbon steel. Aluminum will be damaged and will ruin the tank, and stainless will at best just fail to blue.<\/p>\n\n\n\n<h3 id=\"h-how-many-bluing-cycles-do-you-need\" class=\"wp-block-heading\">How many bluing cycles do you need?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">At least three. Run more until you reach the color you want.<\/p>\n\n\n\n<h3 id=\"h-is-cold-bluing-good-enough-for-a-whole-gun\" class=\"wp-block-heading\">Is cold bluing good enough for a whole gun?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Cold bluing is mostly for touch up work. For a full refinish, rust bluing or express rust bluing gives a more durable finish.<\/p>\n\n\n\n<h3 id=\"h-should-you-plug-the-barrel-when-bluing\" class=\"wp-block-heading\">Should you plug the barrel when bluing?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">No. Trapped air expands in the boiling tank and can blow the plugs out.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To blue a gun at home, strip it to bare steel parts, polish or blast them, degrease them in hot soapy water, then run express rust bluing cycles: boil, apply the solution, repeat, boil 10 minutes, and card off the rust. Three cycles is the minimum, and more cycles get a darker color. Finish by [&hellip;]<\/p>\n","protected":false},"author":80,"featured_media":132154,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_specdata_upc":"","_specdata_placement":"","footnotes":""},"categories":[1052,285,72],"tags":[132,201,102,2359,614],"featured":[],"hunt365":[],"class_list":["post-132151","post","type-post","status-publish","format-standard","has-post-thumbnail","category-chris-mace","category-coatings-and-finishes","category-columns-gunsmithing","tag-buzz","tag-diy","tag-feature-articles","tag-gun-finishing","tag-gunsmithing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>How to Blue a Gun at Home: Express Rust Bluing Step by Step<\/title>\n<meta name=\"description\" content=\"How to blue a gun at home with express rust bluing: gear list, prep, degreasing, boil and card cycles, safety, and 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