I used the Reflectix in my 4t6.
Some pictures here. I applied with Super 77 spray adhesive. My truck has sheet metal panels that would hide the insulator. It's been 30 years since I had an AD so I'm unsure how you could cover. Some options possibly would be make up some sheet metal panels or use a 1/8" Masonite an cover with upholstery or paint. Have fun and good luck
Dan
