Fine grade sandpaper or Comet cleanser and a Scotch-Brite Pad are some good scratch removers for Corian. Use mildly abrasive products to avoid damaging the countertop.
Corian is a type of countertop used in kitchens or bathrooms. It is an alternative to stone or granite countertops. Corian is made of acrylic resin, and its color runs into the deeper layers of the countertop, so buffing reveals the unblemished color underneath. Buffing is also known as "renewing".
Minor scratches can be carefully buffed with fine sandpaper. Another method is sprinkling some Comet cleaner on the scratch and then buffing with a Scotch-Brite pad. Deeper scratches usually require professional refinishing.