I have twin sidemounts on my '31 Coach and as you may know, this means the spare tire wells are quite close to the wheels, pretty much right in line with them and fairly visible from side on or front view. After epoxy priming my inner fenders including the inside of the wheel wells, I sprayed on "Rocker Guard", a rubber like product that leaves a slightly pebbled finish and goes on in a very even finish. I then over sprayed this with 2 coats of black semi-gloss paint. Makes a very nice (even if not original) finish and I am hoping will not chip as easily as bare paint. Time will tell.