The removal of fingerprints and scratches from the non-label side of CDs and DVDs. Although lasers can read a disc with minor scratches, heavy scratches will cause read errors. The lowest-end repair kits provide a bottle of liquid and hand wipes for removing minor scratches. Consumer machines are widely available that buff the disc surface, while high-end prosumer and commercial machines resurface the disc by sanding or reshaping. See also data recovery.