I have this original bench seat from an old Ford truck. The material is in really good shape. I cleaned the vinyl with Gojo hand cleaner and it really looks good. My concern is the burlap under the bottom seat cover. It is rotten and disintegrating. Is this a problem? Should I replace it? Can I do something here to make the seat last longer without undoing the seat cover? Maybe fish a new piece of burlap or something under there. Any suggestions?