This guide is for anyone who has a scratched CD that is not working any more. In most cases this relatively quick and easy method has worked for
How to Repair a Scratched CD - iFixit Repair Guide
Repair Café US
How to Remove scratches from a CD - iFixit Repair Guide
4 Ways to Fix a Scratched CD - wikiHow
4 Ways to Fix a Scratched CD - wikiHow
How to fix a circle-scratched PS1 disc!
How to Repair a Scratched CD - iFixit Repair Guide
fixing a scratched disc with toothpaste
How to Remove scratches from a CD - iFixit Repair Guide