To be honest, this is one of the bigger reasons I hacked my Wii - my son decided that a dime should go into the drive slot so when I went to load Zelda it caught the dime, and scratched the hell out of it when I tried to eject the disc. Thankfully, the lens wasn't damaged, and I've now moved the Wii to higher grounds. I'm using a backup of Zelda now (I've been so busy over the last year and a half I still haven't beaten it, but I intend to before the new one comes out), and it works like a charm. For general scuffs, if they're worth the repair (like my original copies of Lunar 1 & 2 for the Sega CD), I'll take them to a brick and mortar video store and have them buffed. It's like a dollar a disc, and I don't use them that often, so it's worth it.