How do you fix a xbox disc with a ring on it

there is exacttly nothing you may do the only tricks it will work for is black ops and modern warfare which you can use the toothpaste trick but games like madden,2k12 and many other games that trick dosen't work but you can do this get a game from a freind and ask if you can install it on your xbox 360 it will take some time to install it will work 100 percent