Is there an easy and safe way to trim/grind the edge of a glass plate?
I'm trying to fit a pre-cut mirror glass (rescued from a $5 Wal-Mart mirror) into the back of a shadow box. The mirror itself is not quite square, so there is one corner and part of the adjacent edge which won't quite fit into box (about 0.5 mm overlap). If this was wood or plastic, I'd grab some sandpaper and bring the edge down to fit. Is there an equivalently easy, but safe, method for doing the same with glass (3 mm thick)?