I used it on my car with the tie coat primer and then a layer of epoxy primer then color. I have been noticing something on my Jeep though. I reduced it with acetone, which they say is wrong, and sprayed my bumpers about a year ago. It sits outside year round and gets some pretty rough use, it was bare clean metal before but the rust is starting to come through in places. I don't know if it's the acetone or not???

Sean