Has anyone here ever tried using a nylon bristle wheel to get the corrosion
out of those pits you described? A nylon bristle brush is round and it has
a mandrel to fit on to a drill motor. The nylon bristles don't scratch the
aluminum as they are softer. If you rush to fast the nylon will burn and
darken the aluminum but at least it won't eat it. ;)
Tom
WBCCI 5303