Has anyone painted their car with rollers

Do the people that use the roller still use an automotive paint??

No. The KEY to the roller paint job is using Rustoleum Professional, which is self-leveling paint. When thinned properly, the wet sanding is a lot less than you'd think, per layer. The method uses several (6-10) very thin (translucent) layers of paint.

If my car was ready for paint, I'd do it in a heartbeat.