Yes I'm going to be putting a rig that I have rebuilt into my van and inside of the van is looking beaten up. So, I want to put some kind of paneling up on the wall and ceiling so it doesn't look like crap.
There are also companies that make plastic wall panels for Chevy and ford vans. I had them in my 08 gmc. With unfaced r11 on the wall behind it. I think the Sapphire demo pro 1200 had that kit. It's absolutely excellent for a CC van. About 1600 bucks.
For one of my vans I hired a local out of work carpenter.. I had him put insulation behind 1/4 plywood(I painted it white), I think he charged me $450 ..