For a post that started out as "where can I paint my car for $3000", this is a heck of an interesting post.
How many colors does this stuff come in? Can it be tinted to near any factory color?
I think I'm in for a trip to HD this weekend, pick up a piece of 16 guage and start experimenting!!

Paint - $30
Supplies - $20
Look on people's face when you tell them its put on with a roller - PRICELESS