400 and 1000 grit grinding stones work well for this. I only have a problem with the rubber boot. During use, the stone appears to move and then possibly slip out of the shoe. I used clamps to surround the stone to secure it but this was a temporary fix. I may have to build a mill where the stone stabilizes better.
Sharpening stone Hatamoto HT0960, green
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π Enhanced Superfine Assortment: Various Sizes, Multi-purpose, and Reusable
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