geez you invented aerobic bullet coating. Me I dump about a 100 bullets (44/45 more if smaller) in a cheap Frankfort anrsonel vibrating tumbler for 15 minutes. Dump it into a colander to remove excess pain and dump them on a sheet of non stick Reynolds wrap and bake for 15 minutes. Never had a problem with coverage using smokes black gloss. tried air soft bbs and even buckshot in the tumbler but it didn't add a thing. Just the bullets pounding against each other does the trick.