from Mini Brew - (note - I have no idea what a "gab" is)
Scratches. One need not worry about tiny scratches in plastic or stainless. There are two answers to the problem and both are easy. First do nothing. Leave the scratch, clean it with a soft brush and sterilize with hot water. The second answer is to remove the scratch by cutting down the sides. Use a dull knife drawing it toward you, scraping away the plastic. Grinding and buffing scratches in stainless steel is complicated.