well, the scratch remover is applied like wax, but you have to rub or polish it more to remove the scratches. Then wipe it off, and see how it looks, and then round 2/3/4 as needed. Clean the surface good with a damp rag, apply your decals, then wax. The stuff I've used will remove light/superfacial scratches, if the scratches are deep, you can try some polishing compound or rubbing compound, as each have different levels of abrasives. The rubbing compound is for really rough/oxidized surfaces, go easy with it to see how it does. I would try the plastic scratch remover, then polishing compound then rubbing compound depending on how bad the scratches are. If you've polished/waxed a car, same concept but your dealing with painted plastic, not metal, so its a different type of paint imo.