Update: I poured out each pound of powder on a white sheet of desk blotter paper, looking for any red/rust dust. Four pounds of IMR4350 and three pounds of IMR3031 all clean. Whoopee!! I didn't check the Norma 200 or the half can of IMR4064, but will if I ever use it. I don't need the Green Dot or Blue Dot, Pyrodex, or any of the black powder, so will probably turn the smokeless into fertilizer. Can the same be done with black powder.

"An archer sees how far he can be from a target and still hit it, a bowhunter sees how close he can get before he shoots." It is certainly easy to use that same line of thinking with firearms. -- Unknown