Hi, I saw your post on the painting of your boat. I am getting ready to attempt painting my 33ft RV. From the info you posted, I know I need to sand. I assume I can get an attachment for a drill and just go for it? Then, you said to make sure I prime with Zinsser's Bullseye primer. Then, you said to use Sherwyn-Williams industrial enamel. Did I understand you correctly when you said that it was OK to roll the paint on and there were no roller marks? Also, do I need to thin the paint? It sounds like you just used regular enamel paint and nothing specific for vehicles? Thanks for any input you can provide.