Actually glavine, that would be immensely costly to call in a company. It would be more cost effective to completely install a new sink. Bridge can do the repairs to the scratches herself/himself very easily, although I don't think scratches is what the concern is at the moment. Dupont sells kits to get out scratches but there are products available at most stores that you can purchase separately to remove the scratches. Care of Corian is listed on this link:
Countertop Care
Regarding chips in Corian, very problematic. You need to cut out the portion that is damaged beyond mere scratches. In that instance, you are right in that it is cut like wood.