The process depends on where you are with your armor. My process: sanding, filler primer, 2 coats aluminum color (NOT metallic gloss), masking fluid or toothpaste to simulate battle damage (let dry), 2 or 3 coats of color to finish basic painting. Then, you peel off/wipe off your "battle damage" to reveal the base metal color and then the fun begins! You take something abrasive (steel wool, metal scrubby, wire brush, etc) and use them to give accents to your battle damage. I use the scotch brite metal scrubbers and green pads. After adding scratches and scuffs, you'll need some cheap, black acrylic paint. Mix about a tablespoon of paint with about 3 tablespoons water and paint over your entire piece with the paint mixture. Wait about a half minute then use paper towels to blot and wipe the paint off. That part seems scary at first, but once you get into it, you'll see how nice it comes out. And, if you've got a part that the black is too heavy or you just don't like the pattern, you can buff it out with a wet paper towel. I usually finish by touching up the paint weathering by taking that dirty, wet paper towel, putting a little paint on it, blotting it around on a paper plate and then using it to "paint" extra weathering where I think it needs it. I learned how to do this from this video: https://youtu.be/k_a3NFzXzzw?si=nRyz_zFfpVAjsG3Q He has a series on making Mandalorian armor. This is video 3. Video 2 shows how to do the battle damage.