Yes, you read it right. Put a little toothpaste on a Q-tip and polish the scratched area until they disappear or until they can’t get any smoother. Then wash the CD in water. That should hopefully fix it. If not, just retry polishing with toothpaste. If a few cleanings do not solve the problem, then try a metal polish such as Brasso in the same manner as the toothpaste. There is also a solution that involves gently rubbing Vaseline on the CD from the center outward. But I’m of the opinion if it goes that far and the CD still can’t be read, then it’s time to trash it.