It's garbage. I bought into the hype and bought all their expensive prep products before I knew any better. I applied it on cleaned, scuffed and prepped oem paint. I also applied it to lightly rusted steel that I cleaned and prepped as per POR's instructions. 6 months later most of it was gone like it had never been there, what was left was peeling off like when you pick glue or silicone off your hands. If you're intent on using it, save yourself a few steps and place your money straight into a garbage can.

Now I paint everything properly with a catalyzed epoxy primer. I have never seen the pros using crap in a can like POR, always the legit 2 part stuff.