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.
Indeed. In fact, I often thank the person for getting back to us with a report on the outcome.