Quoted:
Sandblasting / industrial abrasives supply company. You didn't think we were the only industry using corn and walnut for cleaning, did you?
+1 to this, when I was looking for silica sand(can't get anymore), I found that the place across the street from where I work , aside from having the BlackBeauty I needed for blasting, they also had corncob and a couple sizes of walnut ranging from $10-$19 for 50 pound bags, that's where I'll be buying from next.