If you mean scratches on the white plastic inside the refrigerator, Novus plastic polishes (numbers 3 and 2) are a good choice.
After getting the the interior plastic shiny, don't use that sponge again! We have kept the interior of our refrigerator sparkling clean and shiny by using dishwashing soap and water followed by (drum roll) Walbernize! It removes, like magic, the ink and other marks left by various containers.
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