I've used a good quality metal polish like "Maas" to polish out some nasty scuffs and not too deep scratches from abused library cd's. It works quite well as long as things aren't too far gone. It's a bit faster than toothpaste, which does work as a good polish for all manner of things.
CD Repair?
I've seen several companies advertising CD repair by polishing out scratches. Here's a couple of examples: www.wefixcds.com & www.auraltech.com.
Has anyone had any CDs repaired? Successful? Worth the cost? Thanks!