I don't know how well received this idea will be, in the past I have used a small exacto knife (small/angled razor blade) to get in and scrape the surface layer and any corrosion on the contacts away.I am not sure how well I can salvage the original contacts, and they are rivited to the board, and that board is rivited to the main board. I like to have backup plans
Fiberglass tipped brushes might work also, there is plenty of original metal left. It just looks like some surface corrosion, should have no problem re-useing the factory tabs.