Can epoxy primer be used over Rustoleum rattle can gloss black paint?

Absolutely!! It happens far to often where people ask for and receive feedback never to be heard from again. It's nice to see how things turn out because people tend to have the same questions later on. It kinda makes the search function useless when the results aren't posted.
All of us car nuts are in a continual state of learning. IF we are actually doing something.... It would be great if we would all think to share our latest knowledge. Many times we don't because we get tired of having people tell us just how wrong and stupid we are ...maybe?????

I have NEVER top coated a car with Rustoleum I am doing any body work on and never will. Reasons should not have to be explained. But I have used it on clean rust free or rust cleaned off floors for 60 years/ and inside doors and inside trunk drops on trunk side. BUT my dad back in the 60s told me the stuff was not worth a chit since they took the lead OUT of it!!!! He did have a point back then. Study up. Are there better paint/primers today? Yes. Does the most expensive matrial always \prove to be worth the cost? Not always. Just my old opinion.