Some of the answers on CA were on target. If the disc won't play because of the scratches you need to reduce them. I've done it with automotive compounds/polishes on their own by hand and have also needed to use wet/dry sandpaper (1500-2000 grit) a couple times to get out deep scratches. I didn't sand the whole disc as described on CA, just the effected area with the paper wrapped over a small block of firm sponge, then polished with a little 3" handheld buffer I have. If the scratches aren't too deep, it does work.