I'm fixing to use some of it so I will know later how it works. The guy at the paint store said it was good. There is a story in the new Hot Rodding mag. about using it so it seems to be an accepted way to do it. i do know that the epoxey primer gets super hard and it is a pain to get it sanded but I usually coat everyhing with it first so maybe i have't messed up, I'll find out soon.