Dupli-color roll bar and chassis paint rattle can, off the shelf of Oreillys. Easy to get, cheap, and if you have to touch it up, not a problem. Seems pretty durable too, 3 years and after wiping the bugs off, doesn’t look too bad lol
Some but not all. THey were sprayed from underneath with thinned undercoating and with a wand that resembles one on a weed sprayer. Some light colored cars didn't get sprayed and some black, dark blue or green cars did. The guy in the pit was the one that made it happen. He was in charge regardless of what he was told to do by a supervisor.