I usually use rubbing alchohal.
Follow the link below (Sources and related links) to read about several methods that you can try.
For lightly scratches sometimes either Colgate Toothpaste, Or any brand of peanut butter will work.
If the shopkeeper is kind enough, bring the disk back to him and ask him to repair it.
How can you remove scratches from disks? The best way to remove scratches from discs such as video games, DVD'S, CD'S is to use a product called Brasso. Brasso is very cheap to buy and works very...
You can use tooth paste on a cloth rub it around in circles <repeat 2 more times> and then it should work