Difficulty in procuring high grit sandpaper and a certain type of hardwax oil here in the UK have made me slightly change the way I finish handles involving horn.
I still do the final shaping by hand, but only up to about 600 or 1k, then move onto a micromesh progression to take the ferrule up to a high polish, then take the main part of the handle back down with red scotch-brite, and finish with Tung oil but not left to set fully. Which is actually quicker and easier than what I was doing before, it's also cheaper as micromesh lasts a very long time if you're not using it on metal.
And I think the results are slightly better too; the horn here has a bright mirror shine, and the main part a lovely tactile grippiness. Bog oak, spalted maple spacer, and horn:
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The knife itself is going to be pretty banging too once I've sharpened it. I did the final part of the grind and finishing myself, properly thin bte, with a slight righty bias.
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All of which is very pleasing because it's for an old wine biz friend of mine, who's one of the nicest most generous people out there, and I genuinely can't think of anything I'd change about this knife and handle. It's completely perfect.