I used it on a bolt gun. It turned out wonderful. So far it seem to be holding up well. The only spot wearing is where the bolt comes in contact. I accidently banged it against a few things and it didn't even leave a mark.
i have kg-gunkoted a a Mossberg 500 and a mosin nagant. Go to harbor freight get a cheap model spray gun setup for 10.00 and use a compressor from a nailgun your good to go. i dont like the cans stuff from brownells.