I saw an interesting website awhile back describing automobile painting with a roller on a budget. Sounds amusing and easy to dismiss as a crank, but the technique was described in detail, and the results were astonishing. Labor intensive and requires many coats with a thinned out paint with fine grit wet sandings between coats, but the results are impressive and durable.
Paint Your Car With Rustoleum Do you have a fun car that you just KNOW will go faster with a brand new paint job? This method is based on the idea of using a foam paint roller to put many layers of Rustoleum on your car. Except, I used a professional airgun and only 2 coats. The result? Pretty dang good, for the money. Why? So why Rustoleum? Well, on the internet you can find people who rolled it on, and the cars look pretty good. But most of all, you can get a quart for under $5 at any hardware store, whereas automotive paint can be 20-50 times that much.