Grinding The Bottom Of Your Pots Ceramic Arts Daily · I have an 8 inch doulbe wheel grinder but 6 inch is more use the 60 and 80 grits you can find them cheaper but norton is the brand and cystolon is the specific wheel Also a bench grinder with a brass wire wheel for stoneware and other uses I keep a 120 fine wheel for steel sharpening and smoother work The courser stone is for glaze