[rotorwrench]

I've peeled & stuck a lot of stuff. I've never had good results without cleaning the surface. The old ford inner floor coatings left a lot to be desired. Unless it is still good and solid with no cracks or delamination, I'd remove it. The floors on the early 50s cars suffered from a lot of corrosion under the sprayed on tar based stuff. They didn't prime well under it and corrosion got started with the first water contamination on there. 20-years later you have a Flintstones car. Caveat emptor on what salesmen tell you. My Grandmother was from Missouri and I think the "Show Me" stuff wore off on me.