The Arkansas threads have gotten me thinking about surface finishing, on hard jnats.

If you look across the fora, you’ll get different answers to how fine/smooth a jnat needs to be finished.

You can find posts that say ‘not that fine, in a few strokes it wears down’, or ‘not that fine and smooth it with a nagura’ - which I do for the record. And you can find others that smooth to 2k sandpaper or so, which I also do, well 1500 or 2k, whatever’s out on the bench.

But I have some jnats that are really, really hard. Not Ark hard of course, but with a tomo of equal hardness it will take 3 minutes or so to raise a light slurry with moderate to heavy pressure. They glaze to some extent, like an Ark maybe. I can de-glaze the stone (and nagura) and it works faster, but does a hard, glazed, jnat act finer like a hard burnished/glazed Ark? I think maybe a glazed hard jnat does finish finer than an unglazed one, but thought that I’d throw out this question for the jnat folks. Oz, Stefan?