The powder they spray on with electrostatically charged equipment is some form of thermoplastic resin such as nylon, polyethelene, vinyl, etc. It is sprayed on a sandblasted surface. The item once coated with powder is then baked in an oven at 400F to literally melt the plastic powder onto the surface for a VERY tenacious bond. Items can have no lead or plastic fillers that wuold be destroyed boy the high baking temperature which pretty much rules out car bodies. I have done parts of car sheetmetal such as fender wells, radiator shrouds, etc. I don't know about Hallow's 'shovel rims' he had coated but if those are car wheels that cost sounds WAY too high a price. You should be able to get a car wheel done for about $25 - $30. A transmission case should run about $50, even with all the masking they require. Hallo is right, catalyzed urethane color/clear coat paints are so good in every way nowadays, it would be foolish to use anything else on a car body.