I'm looking for a way to make powdered aluminum - the smaller the grains, the better. I know that it's probably possible to buy it, but I would rather make it if it's possible and not too hard, since I have plenty of aluminum and I don't have a lot of money. So, does anyone know a way to reduce the aluminum to a fine powder? I can just rust other metals in salt water, but I don't know what to do for the aluminum. Thanks for any help you can offer, even if you tell me I'll have to do it mechanically.
