The rocker panels on my z71 have seen better days for sure, and being away at school for 9 months didnt help much. There is a fair amount of stuff basically caked onto the rocker panels, i suppose just various forms of road junk and tar. Some spots are just tiny dots that as hard as a rock, others are maybe just under dime sized. I have tried clay bar and some bug and tar remover but that doesnt seem to help. It appears like the stuff has embedded itself in the paint and is even below the clear, is there anything I can do to get this stuff out?