Originally Posted by
JimR
Not far at all.
Coming off a 1K, I routinely hone razors on Botan-Tenjou-Koma-Tomonagura (finsiher) slurry. I have tried a similar route on other hard hones, and had reasonably good results, though the finish makes a difference. I don't have a CF, so I can't say how it will work, but your assumptions seem sound.
So on a CF, I would recommend that same progression, though I have no idea how a finishing slurry would work.
As for the perceived contradictions, all I will say is this: botan slurry is made of particles that are larger than the particles in Mejiro/tenjou/koma slurry, and that's why you should wash your suita. How much bigger? No idea. That's why grit is irrelevant--grit, as a measure of size, is really hard to measure in natural hones.
As a frame of reference, I'll say this: I have honed chips out of Japanese Kamisori and hollow ground wetern style straights using all kinds of slurry.
To hone a chip 2mm long and about.5 mm deep from a full hollow razor, it took approximately 3.5 hours on finishing slurry. A similar chip took 20 minutes to hone out on Botan slurry. It took 10 minutes to hone a chip out of a Kamisori on an Aoto.