I found my 50000 mesh diamond powder (can not find 100000 yet). Rush to polish edge - it definitely got mirror polish, unlike after Green Rouge. So I think I was right about Niobium Carbides being harder then Chromium Oxides...
But no hair whittling yet! I see that hair starts dancing way more then before - edge bumping on hair shells, which is good sign, that edge is not somehow rounded up, but it did not bite in and not shave. I was able to do this with both ends of hair fixed, but not usual way yet. Let see if it will whittle hair after 100000 mesh diamond powder - but I need to find it first.
Thanks, Vassili.