I need one more whack at low grit, but I got it up to 400 level polish for a progress report. Any remnants of pitting in danger zones will be eradicated then and then I am bumping back up as I feel it would just be getting greedy given what I started with and it would be a major case of diminishing returns.. I've been doing this in 1-2 hour blocks. It is just draining to constantly be mindful of maintaining the angles on the faces of the blade as well as the text so I take breaks. I bought some cheap sneaker inserts and folded them into wedges to spool the sandpaper around. It has served me well.