I have a feeling you gonna be removing your carpeting. Whoever recommended "just" to paint the interior/floor pans and add carpeting steered you wrong! You need some type of a tar matting like the original to keep sound and head at a minimum. I installed tar mats plus I added a dynomat throughout the floor, rear seat and front as far as I could reach. I love the results and have very minimal road noise or heat. Epoxy paint is also a very good idea to fight of moisture.