Two Mags from Florida

I need to clean them up. They're corroded on the outside from the salt
air, but they work. Anybody know of resources? I know how to take them
apart and put them back together with an exploded view from the parts
manual, have done it before, but don't want to harm the bearing races or
demagnetize.

Which one of you feisty experimenters has done this successfully?

I was thinking of bead-blasting them but for obvious reasons am hesitating.
Just the cases are nasty. The insides and guts are OK.