I have an audio disc that was handled by a little one & it now appears to have a few minor scratches. Normally I wouldn't be too concerned with it, but this is a rare imported CD that I got & I don't want to have to buy it again. It seems to have affected playback a little & skips at one point. Not always, but I also occasionally get a 'no disc' error message in the player when inserted. I'm gonna try to back it up to a CDR, but if that doesn't work, I was thinking of getting one of these disc repair kits. Do they really work? If so, which one is recommended?