Which preposition to use with polishings

of Occurrences 13%

"If they should go to the Victory, I'd be mighty proud to do all I could to look after 'em, Johnnie," spoke Mandy from the shadows, where she sat on the floor at Laurella Consadine's feet, working away with a shoe-brush and cloth at the cleaning and polishing of the little woman's tan footwear.

from Occurrences 2%

When our Statesmen are sufficiently improved by these several Instructors, they are to receive their last Polishing from one who is to act among them as Master of the Ceremonies.

Which preposition to use with  polishings