Working with Corian countertops and sinks for many years, we are often asked how to clean scratches off of them. What we suggest is to scrub it with a scotch Brite pad, or in the case of more serious scratches using wet sandpaper instead. This will leave you with a dull surface, which is normally what we strive to achieve. If a shiny surface is desired it will require extra polishing tools that most people don’t have available. We do not recommend shiny Corian surfaces because they are much easier to scratch.