NASON Epoxy Primer/POR-15 Questions

To the OP , por15 isn't meant to be used over any sort of paint or primer it is supposed to be in direct contact with metal and magically convert any oxidation into a porceline like finish , what I am saying is it didn't convert all of it and the rust actually grew slowly within the por 15 , now I have been told mixing it 50/50 with tremclad makes it work much better but if you clean the oxidation off completely and coat with 2 part epoxy there is no reason to cover that with POR 15 because it won't be doing anything anyway .