They make a few CD repair kits that seem to work ok, But what you might want to do is use a White toothpaste (Crest for example) and rub It over the damaged area.
Here's the scoop...
http://www.techtv.com/callforhelp/howto/story/0,24330,3375597,00.html Baking soda toothpaste
Baking soda toothpaste, huh? Actually, any mild abrasive like furniture polish, Pledge, or plastic polish works fine for removing CD scratches. Just take any lint-free cloth, add some of the abrasive to the afflicted area, and then wipe. Make sure to wipe from the center of the disc to the rim in a straight line. Never wipe in a circular pattern.
This only works on minor scratches, but I found the results were OK. While it does not work well in bringing back heavily scratched CDs from the grave, it does help to stop CDs with light to moderate scratches from skipping.
Finally, use baking soda toothpaste with as few additives as possible. Some of the gel-based baking soda toothpastes tend to leave a sticky film on the CD, which requires a bit of effort to remove.
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Another home remedy I tried was car wax. Unlike polishes, waxes fill in the cracks or scratches. Just pour or rub the wax on a scratched area and wipe it off with a lint-free cloth from the center to the rim.
I didn't experience the greatest results, but it could have been the car wax I was using, liquid Turtle Wax. Some people testify that this works, but I believe you may have better luck with a Carnauba-style car wax. If you don't have access to car wax, you can try furniture wax like Pledge instead.
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There's always a chance that you may not be able to salvage your precious CDs.
Really bad scratches circle around the disc. A scratch from the center to the rim isn't as bad. A CD player can miss a beat and you won't notice it, but if the scratch follows the track pattern of a CD you'll notice a lot more skipping.
The worst place to scratch a CD isn't on the bottom but the top. Why? Because the label side contains the reflective material required to bounce the laser back to the CD player's pick-up head. It's also close to where the pits and bumps that make up the data track on a CD are stored. Scratch that and you'll most likely never play the disc again.
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Also this Product for about $15.00 ucks might help you.
http://www.cdrepair.com/ Stephen