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Keith_J wrote:Soak the stone in ammonia to remove the aluminum. Old slivers of bar soap work great to keep the aluminum from loading too bad. Better than wax even. Works on burrs too. Soap is a salt of fatty acids and sodium so it is aggressive to aluminum plus it has a higher melting point.
WoodpeckerWelder wrote:At work we use Boelube on all of our abrasives for aluminum and all aluminum drill bits and burrs. It's hard at first but melts as the tools heat up. You can also apply it to the surface.