When I lap these things to avoid the slurry build up Shaun mentioned, I do it in the kitchen sink, under running water. Helps with stiction as well. The stone is probably a good finisher. To me Eschers or Thuringans provide a smooth edge that is not as 'crisp' as that of a good synthetic finisher. I imagine some would like that feel better, and others would prefer the crisp feel. I would finish on that stone and strop and shave. See what it feels like. Although the all pretty much look alike, they are not all the same.