Came across this today:
http://www.autoblog.com/2010/04/26/how- ... ur-garage/
For only $120, it's very tempting to try...
Though, reading through the thread, I noticed the guy got the wrap through his buddy, so he probably got a decent discount on it.
*Edit* Yeah, looks like $500ish for a 50 yard roll. But you'd have a ton left over in case you messed up...
But it looks like there's several different kinds to get, but a roll of Oracal 970RA runs $500ish.