Quote Originally Posted by del56 View Post
Prevals work good if you thin a little more than necessary. Rattle can paint does not belong on the exterior of car for anything more than temporary rust prevention, which gets sanded off later. Brackets and such and inside panels I think it works just fine.
Rattle can primer works if you're spraying compatible rattle can top coat over the primer. If you're using quality automotive paint, then you need a compatible primer or you risk having a bad reaction between primer and paint, which may be a delayed reaction.