last paint booth I wired, the tech's from the company who made it came in and sprayed a flexible coating on the walls and floor. I asked them what it was but can't remember the name off hand. (some of the guys that paint for a living around here might know)
It looked like white latex paint. It peeled off really easy. They said you can get x number of paintjobs and then you peel and re-spray.
pretty neat. I'm sure its expensive though.