If you lived through the MP3 revolution and still managed to hold on to a few of those ancient relics known as CDs, they're probably in pretty bad shape.
A few scratches here and there, though, don't necessarily mean that you have to toss your entire Van Halen box set out with the Thursday morning trash. [Ed. note: Although you should've done so with the Sammy Hagar era stuff long ago.]
The only thing you need to bring your battered CDs back to life, in fact, is a simple dab of Vaseline, and a piece of soft cloth.