grinding glass with aluminum oxide bit

Glass polishing and scratch removal - help! - WoodenBoat- grinding glass with aluminum oxide bit ,I have been trying to remove scratches, erosion and water marks from some 60 year old glass on our boat. I have used cerium oxide in a water slurry and a rotex sander with a hard felt pad.Grinding Lathe Tools on a Belt Sander – For the New Guy ...The carbide tool made the cut but chatter was excessive. Speed was as low as I could reasonably go and the feeding force was very high. The finish is really …