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Posted by Franz on Monday, February 16, 2009 at 21:40:26 :
In Reply to: soda or sand posted by ccsammy on Monday, February 16, 2009 at 10:35:06 :
Look into crushed glass.
Cuts better than sand, on silica outdusting, and doesn't retain water like sand.
Of course there are always walnut shells and corncob too.