The problem is to get rid of the Aluminum Chloride (stiff white powder) that formed under ss rivets. Then treat to Phosphatize the pits as described. Results are much better than just (temporary) mechanical removal of "some" corrosion.

Dacarls:
A-class USA 196, USA 21, H18, H16
"Nothing that's any good works by itself. You got to make the damn thing work"- Thomas Edison