This is a trick that a lot of people already know, but just in case they didn't I posted this.
Teachers! Did you use this instructable in your classroom?
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Step 1: Gather the Materials
The Needed Materials for This project are:
1.) A scratched CD
2.) White toothpaste (not the gel kind)
3.) Warm water
Step 2: Get Er' Dun!
First get you CD and smear the toothpaste on the scratched surface (NOT TOO MUCH, ONLY ENOUGH). Then rub it around a little with your finger in an up and down motion, NOT A CIRCULAR MOTION, IT WILL RUIN THE CODING. Lastly, rinse it off with warm water in an up and down motion.
And Voila! A usable CD!
Step 3: After the Resurfacing ( an After Picture for Weissensteinburg)
This is a different CD, not the blue one. And I am in the process. But anyways, note how the CD isn't too scratched.