Automotive finish product Meguiar's "Scratch X" is wonderful also. And "Viva" brand paper towels do not scratch either! I use the Viva with the Meguiars' Scratch X on all my CD problems, Dustcovers..etc.
There is a spray called Plexus you can get through Music Direct that is the best I've ever seen. It will remove small scratches and make your dustcover shine.
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