My 65 came with factory undercoat on the inside of the fenders. It was a bear to get off but actually saved the old farm truck from rusting away. Areas that didn't get it were rusted out. I repainted it all with Rustoleum Satin Black. Looks better smooth. I tried the Duplicolor Roll-on bedliner for the floor in the cab of my Redneck Hummer (1988 Chopped and lifted Suburban). I wasn't real impressed with that. Might as well have painted it with Rustoleum paint.
