I keep a few marble cut-off strips, roughly 3"x8", and have rough to finish sandpaper (1 for each step, 3 is enough for the layperson) spray epoxied on them. When ever I have my chisels out for more than short work I have the blocks out so I can sharpen as I work. You can infinitely replace the cheap paper without ever having to worry about your sharpening surface ditching out- I’ve had my blocks for years.
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