NASON Epoxy Primer/POR-15 Questions

Using an epoxy and POR, to me is like using two rubbers, when one will do nicely. I would use the POR, KBS, and DP50 only if I was NOT going to paint over the coating. The risk factor is high for the next coat of primer/paint flake and peeling off, POR now has a product to help adhesion, POR tie coat, POR realized they had a problem. I do use a rust prevention system, I use a rust proofing wand to get in the frame rails and inside door panels, inside rear quarters and the other key areas where I cannot get to with paint gun.
KBS has the product just the same as POR15 and others but, you can get it in the shade/color of your car, my car color is blue, I use the blue coat, if the top coat does flake at least its a blue undercoat. I am not saying people use these product have not great success and they do, you have to take the extra time for prep and then again use the tie coat products. If you choose not to, it would be like painting a black top road.......