Stefan, that's a great idea. My expectation was set by the reading around that I've done which suggests (and in some cases comes right out and says) that there are not yet any commercially available abrasives that are as fine as the finest jnats. That, and I once witnessed what was for me a legendary feat.
I had the privilege of witnessing a distressingly old japanese carpenter do some work. Specifically, he was shaving endgrain off of a cypress log with a block plane. This is something I know a lot about, and I can promise you that there is simply not a more rigourous test of sharpness than shaving endgrain off a conifer and leaving a deep, glassy surface. A western blade sharpened at 8k is 'so good'. Sharpen that blade on .1um diamond film, and it's noticeably better. By 'noticeably better' I mean you can take a somewhat thicker shaving and still get that glassy finish. A good japanese plane blade is noticeably better than those two.
This carpenter however, was taking shockingly thick shavings. He was taking shavings you just simply cannot get using the above methods without leaving a not so great surface. But he was taking these incredible shaving AND leaving a surface that looked like it had already been shellaced and laquered. Those of us watching were just dumbfounded. Every 5 or 6 strokes, he'd pull out the blade and go to his natural stone--a stone that for all the world looked like flat top doorstop.
I know woodworkers that can sharpen better than I on artificial materials. They can't do that. I want to do that: that's the grail. If I can get that edge, chances are I'll lather up face, look in the mirror, pick up the razor, and my beard will just say "ah...what's the point" and fall right into the sink without any further ado!