Review on USA Made Diamond Lapping Paste Polishing Compound 600 Grit Mesh 22-36 Microns For Rock Glass Metal Jewelry Resin Marble With High Concentration Of Diamond Powder By TechDiamondTools by Stuart Sugden

I use this on the bottom of a crystal vase that had started to get less clear than it had been. It did not have any deep scratches, I found the instructions thoroughly but it really practically looks the same as it did before I used it. Tried three or four times. Would not buy again. Does no more than very very fine grit sandpaper, which is less expensive. Send a question to the supplier to see if a finer or coarser grit would help. No response.