Good Earth loaned us his wet sander -grinder and Gergis and I worked on finishing a friends Washington jade slab. It is very low end jade and we expected it to be a problem to polish, little did we know. Greg made the first attempt using new polishing pads and with his knowledge of jade used very little water on the 3,000 and 6,000 grits. The result was not satisfactory. I then repeated the sanding sequence using very worn pads up to 3 and 6 thousand where I had to use new pads. Only a tad better.I then went back and dry sanded the 3,000 and 6,000 grits. This was better but not really polished. Greg hit a few spots with a muslin buff and zam then fabuluster with no change.Next I used a felt buff on the machine with chrome oxide cream. I had high hopes but no go.In desperation I went back and dry sanded the last three grits,1500. 3,000 and 6,000. I made an excessive amount of passes for most materials and a poor polish finally came up.My advice is to let me buy the jade slab next time.