You know what works a little better then that Wisdom foam is a hard rubber that is about 1/2" - 1" thick. It is indestructable unlike the foam Wisdom sells which gets torn up pretty easy. It also doesnt absorb moisture which is a huge plus.
The vinyl artwork that Hoffa spoke of is a neat idea. I dont have any experience with it but it would be a neat idea. The only places artwork on a 28' pup raiders that gets scratched is the edges on each panel from putting it in and taking it out of the rack.
I am unsure what a artist would charge for painting a raiders. Bobby Meyers in Gibtown is currently reufurbishing a raiders for Coleman and I think he is using the painter TJ (or CJ). Dennis Kline does some real nice airbrush work too. He did Wades and the one that Burton owns now.
KingKong- Did you replace the lexan on the side itself or the clear plastic that forms the tube of the slide? If so, how much does it cost? Kids feet really scuff that up pretty good.
Good luck- The Raiders is a great ride.