To prevent mold from growing, put a few drops of chlorine bleach in the water that you soak your stones in. To clean up moldy stones, you can lap them on a piece of 1/4-iri. plate glass with either 180-grit silicon carbide sandpaper, or 90-grit carbide particles (available from auto parts stores). Despite any remaining stains, the stones should function as well as ever. From time to time, your waterstones will need further lapping. This keeps the stone flat and clears it of any clogging particles.
Leonard Lee Ixre Valley & Veritas Tools Ottawa, Ontario
No Splintering, No Tearout, Life-Long Performance.
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