how do you give aluminum a "brushed" finish?
Answers:
A wire brush in an electric drill. For an example, check out the movie Spirit of St Louis. Someone is shown using a cup shaped wire brush in a drill press to make the circular fish-scale design on the cowling.
Other answers:
Just brush it in circular motions with some steel wool or other abrasive substance.
Just brush it in circular motions with some steel wool or other abrasive substance.
giving the final finishing touch by brushing
your guess is better than mine. I know you can clean
your aluminum with cleaner to take the rust off it.
Its a orange cleaner.