Hello,I know many, if not most public library use a machine to buff-out the scratches on their collections of DVDs and CDs to make them playable again. I have a friend who accidentally damaged the data surface of a rather valuable, collectible CD. It still plays but the surface scratches lower the value. I was curious exactly how this CD repair process works. Is the protective plastic layer ground down? Does a polish or wax fill-in the surface scratches? The reason I ask is my friend is considering applying this repair process at a local video store and he's concerned about introducing more surface scratches or introducing other imperfections that may lower the value of his CD further.Thanks for your insights! Dan Hutchins Director Van Buren District Library 200 North Phelps Street Decatur, MI 49045 dhutchins@vbdl.org http://www.vbdl.org 269-423-4771