The Acetone worked a lot better than the Lacquer Thinner. I tried the heat gun once again and got a blister on both thumbs from trying to heat and roll the adhesive. Think I'll go back and buy another can of Acetone. I decided to use Rust-O-Leum tested paint instead of the truck bed liner. It's a light sandy texted feel and will use a primer underneath and clear coat over the paint. (Should I ever get this adhesive removed!)