1: use metal pads #30 grinding , make surface smoothly 2: use metal pads #80 grinding to make the surface scratch more thin 3: add harder (a chemical liquid which can make surface because more harder) waiting 48 hours 4: use #50 resin pads polishing 5: use #150 resin pads polishing 6: use #300 resin pads further polishing 7: use #500 resin pads polishing 8: use #1000 resin pads polishing, (at this time #1000, you will find surface because shiny) 9: use #2000 resin pads polishing further 10: use #3000 resin pads polishing (now the surface will very very shiny, just like mirror)