99.9% of the time a coat of epoxy primer will seal anything and protect the rest of the paint job. That does leaves 0.1% possibility that it won't. "You gotta ask yourself one question. Do you feel lucky?, well do you, punk?"
I have gotten lost in trying to follow this discussion.
Epoxy primer is an excellent first/sealing coat over clean/bare/"washed" metal.
Is epoxy primer the question, or is EDP the question?
Remove the EDP and then epoxy prime.
