I'm thinking of spraying a bed liner on the underside/floor pans of car. The car has floor patches completely welded, sandblasted and coated in SPI black epoxy. I'm thinking of spraying bed liner, but concerned it may reduce the value of the car? It's a 71 Buick GS convertible. It's still on the rotisserie, and this would be the ideal time to spray a bed liner. Alternatively, I could leave it in SPI epoxy. Best bed liner if I go this direction?