A gloss scratch on plastic is usually much more difficult to detect, as these types of scratches often create an illusion that the surface itself has not been damaged. This type of scratch is deeper than the matte type, and it has a higher probability of damaging the plastic. These types of scratches can be removed without there being any visible residue after learning how to polish plastic. You do not need to use household cleaners or abrasive materials to repair these scratches. You can easily use some type of commercial plastic scratch remover, but be sure to test it out on a small area first.