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I used light mineral oil or even baby oil to keep the stones from loading up.
If I have to float out crap that has clogged the stone, I'll soak the surface in diesel or kerosene and run an old square-edged file across it on edge a couple times, wipe it off, flip ends and repeat.
The function of oil or water on stones is to keep the stones from loading up when you're working metal on them.
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