Well, changing the subject somewhat, what about corn cob media? Is it possible to rejuvinate that stuff by any means? Seems to do a good job of cleaning cases, and polishes 'em up even better with case polish added. I sometimes hate to just throw it out when it's cleaning ability is lost, even though it may plain be necessary to pitch it once it's reached that point. Patriot
P.S. As for the dust when sifting, I make it a habit to NOT inhale at that period. If I have to, I just walk a little ways from the area till the dust clears.