The headliner in my toyota mirage is sagging. The foam backing on the material has rotted away. I came accross a product called Rustoleum Vertical Restore for decking, walls, basements, etc. It rolls on like paint but is 10 times thicker and has a texture to it. I thought about taking the headliner completely out and just using this vertical restore product. Was wondering if anyone has used this product before or if you know of a good product I could use?