To restore a disc to like-new condition, the protective plastic layer needs to be polished down to the depth of the deepest scratch. Both the Hybrid 2.0 and the VMI 2500 use a micro-abrasive solution in combination with a buffing process to accomplish this. Depending on how badly scratched the disc is, this can usually be accomplished in about 30 seconds to 4 minutes.
To speed up the repair process, a disc sander can be used before polishing. The QuickSand cuts away some of the worst scratches in just ten seconds. Disc media resellers and libraries with large collections find that using the QuickSand speeds up operations by reducing the amount of time it takes to repair badly damaged discs.
Although polishing a disc does remove a little of the disc surface, it’s only a few microns of depth. This means that, if required, a disc can safely be repaired many times over. This is especially important for video rental stores and libraries looking to actively extend the circulation life of their disc media.
See the factsheet on disc restoration.