that stuff is tough as rubber, but looks terrible , check out some truck beds, you then can see what kind of finish you will have, just plain black, no groves in it like the real rubber made for the running boards, altho if you willing to try you might be able to get the real running board finish if you have an old cover you can use to press the flook into the material before it dries, use light oil or diesel fuel as a release agent, but no matter what it wont look original