Steel wool without soap.
Comes in different grades.
Start with a fine or med,, heavy can leave scratches. Careful as the rust is removed you can eat unto the Crome; if the Crome plating is thin.
You cantake your drill and put a large drill bit on it ,,, then run the bit thru a clump of steel wool and let it spin. Works good on heavy areas andhard to reach crevices.
Works like magic!!!!