I have plasti dipped my tail lights on my Caliber R/T with regular black plasti dip with 3 REALLY THIN COATS. It's street legal, in my state (Virginia) you have to be able to clearly see the lights/blinkers from 500 feet. It takes practice to do it right. I've also plasti dipped my rims, grill, emblems, and my radio bezel on the interior.
The pictures do not do justice. In person it looks great, no blotches, streaks, soft spots.
I'm starting on my Ram now.