I used Dupli-Color bed liner for the floor, door steps, and the bed steps on mine. It comes in spray cans and quart cans for roll/brush on application. I find that the spray cans were easier to use for some of the applications, no cleanup and you can control the texture by how far away from the surface you spray. It does seem to chip, but that may be a result of poor prep on my part. Dupli-Color is less expensive than Herculiner.
