Small scratches and scuff marks are much easier to repair than deep gouges. Some CD repair services can repair the disc with a special buffing machine, but these are hard to use without causing damage.
If the CD is very dusty, gently spray it with canned air first. If the CD is visibly greasy, use rubbing alcohol or a CD cleaning solution instead of water.
You might be able to look up your toothpaste brand online to find the “RDA,” a measure of abrasiveness. A high RDA toothpaste usually makes a smoother surface, although that’s not always true. [3] X Trustworthy Source PubMed Central Journal archive from the U. S. National Institutes of Health Go to source