Don't misunderstand - I like PC. The in-bed tires mounts in both of my trucks is PC, and my front tow hooks are as well.
But, PC does scratch and chip (front tow hook) - not that easily, but it does. The bottom of my stock bumper was one big scratch - it got dragged over a lot of rocks/dirt. True, the truck sits taller now, and my wheeling style has changed, but I'm concerned about the PC getting scratched. Once scratched, rust starts.
Doesn't primer/paint bond to the sub straight whereas PC only sits on top?