I've had excellent results with Dupli-Color truck bed coating. Bought it in an auto parts store for about ten bucks a can. I refinished a Gen 1 Mrod stock. Other than sanding, I didn't do any unusual prep. It's easy to do, and if you screw up an area, you can re-spray it and it blends in so nicely that you won't see any misteaks (LOL).