I think the felt bobs are your problem. They will tend to pull out particles from the jade. You will need a harder surface for the diamond polishes. You could use wooden dowels in a flexshaft chuck or perhaps cratex (rubber grinding) wheels or a small drum sander for your flexshaft with silicon carbide cylinders. Perhaps even silicon carbide or emery sandpaper with a split arbor. A little water or oil for lube would probably be good if your surface is really rough, but from a frosted surface, as was noted, a dry 600 silicon carbide grit would work. A lapidary would typically work this on a resin wheel or a firm rubber backed piece of sandpaper or a canvas belt on an expanding drum impregnated with diamond grit and worked wet. Polishing would be on leather with an oxide polish or diamond grit at 14K and maybe then 50K, but a wood surface would probably also work, although since it is hard you have to move the jade continually to avoid flats and hit all of the surface. Felt wheels are not going to work for any lapidary material with the potential to orange peel, pull out or pit. A hard felt buff or felt pad on rubber may work better for some things. But for jade, leather is preferred, generally with a hard backing. Hope this helps. It isn’t hard once the right approach is used.