Hiya Z- I just shot my Colt .22 a week ago with the Krylon Fusion OD Green from Wallyworld. Remove what you can, clean well with thinner and shoot. I put 2 light to medium coats on and dried between coats with a hair dryer on high....Then I finished off with a full coat, not too wet and hit it with the hair dryer. The arm can be reassembled CAREFULLY after a couple of hours, and full chip-resistance comes after a full 7 days cure time. I've handled mine every night for the last week, including carrying it to work in a gun case, no wear or chipping. This Krylon Fusion works very well. Also did my buddies Armalite in desert tan...