For the longest time I've just been using the edge straight off my Coticule. Great edge no complaints. I have an Asagi too that I don't use too much(not into razors anymore), cause it is really slow, very fine but slow. Based on Ken's recommendation I decided to try some poly-diamond spray I had sitting around(.05 micron) on the Asagi, to see if it would help it a bit. The Asagi is really flat; it looks like a sheet of glass in the light.
I have to say that I have a new found love for my Asagi. The poly being water soluble, doesn't hurt the stone. You can feel the increased, smooth aggression to it. It left the edge ultra-fine and really sharp, but still with good bite. I think I could've refined it even a bit more too.
That's the only poly I have, and it's a bit too fine I think, but whatever...this combo worked really well as a finisher after the Coticule. Might get some .5 or 1 micron poly as a step before. Thanks for the tip Ken!
Blue #2 Fujiyama Gyuto