I have repaired 100's this way (Score 1)

Go to your local video store. Many now have resurfacing machines. $3-5 per disc and it will be brand new. they use a machine costing a few hundred bucks that works great. Having tried EVERY other cheap product on the market, this is the only way to go and still keep your discs. I have resurfaced 100's od DVD's, CD's, and game discs with one of these machines.

Sorry if someone has already suggested this but there were too many posts to go through.