RJ300

Spectrum to protect and seal then carpet? Maybe some of that ultra suede stuff with a very thin foam layer under the suede to feel like a cushion on the visable panels, carpet the rest of the panels. Idk lol just an idea, i like the ultra suede stuff. 

I think he means just to use the liner or spectrum as a finish. OP, ive used a ass load of ROCKET and RAPTOR LINER. I got it from SUMMIT RACING. My entire flat wall, door panels, and roof was sprayed with it.  Im 99% sure its the same stuff Steve used on his honda wall, and a couple enclosures hes built. Its a pretty cool look imho. Cheap, easy, hides flaws well, and rugged looking. Ive never used spectrum for a finish, but did see the one enclosure Steve used it on,.... looked pretty damn good i think. 

Thanks for the ideas, I really like the suede idea tho. So I think I'll go ahead and seal it then wrap it in suede. And yeah I saw that box Steve did with the spectrum it came out super clean. I'll post finished pics.