I've done a few touch-ups in similar fashion and had good luck. My main observation was that if I tried going straight to the Spyderco Ultrafine, as I often do with other steels, the apex didn't crisp up as much as I wanted. When I gave it a few strokes on the fine stone, followed by ultra fine and then a quick couple passes on a 1 micron strop it was back to hair whittling with very little fuss. To me the ultra fine stone seems to burnish more than abrade for these harder steels. I like using a slightly more course abrasive followed by the ultra fine to burnish the edge, then finish with a diamond or CBN strop with a minimal number of passes.