Thanks. I tried a 220 grit with water and a vigorous circular motion on the workpiece, then went to a 320, and finally to a 420. It improved it a little bit, but still has a long way to go. The only thing I figure that will do it is a fine corundum on a horizontally rotating wheel like the kind I used to polish electrodes before I'd run cyclic voltammetry, but I am hoping there is an alternative..