On the BB Cups, I used a set of water pump pliers (adjustable, ) and then cleaned all the rusty, but still chromed bits up afterward in household cleaning vinegar. After it sat in a bucket of vinegar for 5 hours, a good stiff cleaning brush and some Bar keepers Friend did the rest. Then I soaked all the parts in penetrating oil, dryed them, and then spray waxed. That's my usual way of dealing with rusty old components. If truly bad, a bench grinder and the wire wheel followed by a polish and a re-tapping of threads on smaller parts.