does anyone have a ball mill or something else that could pulverize metal shavings? 'cuz I've got about 10 cubic yards of aluminum and copper chips in my shop from making waterblocks. I'd be willing to give this a shot if I can get the metal pulverized small enough.
Maybe I'll just build a small ball mill myself and stock it with some 1/2" steel balls. hmm, just another project to put in the list.....
I could really see all these little bits of metal clogging up a radiator

They would have to be ground EXTREMELY small and sifted through tiny screens to ensure their size. Anyone have access to equipment like this?