Now, I'm not knocking Duracoat, not in the least. Haven't used it. I've only shot one project with the Cerakote C, airdry, but it was the upper, lower, rail, receiver extension, and 3 parts of a Surefire light. I prepped the parts with 400-grit, degreased the hell out of everything, and shot it. I didn't mask anything, or cover any holes, nothing like that. The coating goes on at 0.0005" to 0.001". I wanted to try it out, and I painted over everything. The big tests or coating thickness were: 1) receiver extension into lower receiver - piece of cake. 2) Badass safety into the lower - easy, functions fine. 3) trigger and hammer pins on a Geissele trigger - no prob. 4) barrel nut onto upper receiver. Done. 5) takedown pin and pivot pin fitment in upper and lower. Done. 6) buffer retaining pin in lower - zero binding. No masking, thin coating, covered everything well, and no issues with just putting it together, or function of all parts afterwards. I have no binding in any of the precise-fit parts. I'm sold on it. Enough to buy a nice spray gun, and keep on going. Eventually, I'll get an oven specifically for baking parts, and move over to the Cerakote H series.