I would go for a dmt double sided stone diamond stone, probably 6 or 8 inches once side coarse and the other medium, it will last forever, never dish and never wear out - diamonds are forever after all.
It will set you back a couple of hundred though, and it’s definitely for metal removal, the medium will give you an ok edge for cutting through hide but the coarse side is only good for setting an edge or for chip removal.
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