POR15 likes clean scuffed bare metal to adhere to. I did a little test when I replaced the rocker panels. I put POR15 on a small area of the EDP coating that I had scuffed with 180 grit. When it cured, it pealed right off, along with the EDP coating. Not good in a spot I can't get back into to fix.
I'm a big fan of POR15, I like it cause it's tough. More so than paint. I guess if I was just going to paint the inside of the quarters and all the other panels, scuffing the EDP would be fine. Unfortunately, POR and EDP don't play well together.
Kevin
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