Filling in the scratch for playing your cd again
Place the damaged CD on a towel or cloth on top of a table.
Wipe the CD clean with a new rag or unused buffing cloth.
Apply a small amount of car wax to the scratch, rubbing it in carefully so that you fully fill in the crack.
Allow the wax to dry. Check the package for guidelines as far as drying times go. If there are none, then wait at least 30 minutes.
Buff the wax with the clean cloth, making sure you go with the length of the scratch, not against it.
Wash the disc with water once you can no longer see the scratch.
Allow the CD to dry, and then try it out in your player.