Here are my sheeves, removed from the mast, before and after polishing with a fiber wheel. Replacement halyards ordered Friday. Yesterday I managed to cut off the mounting screws with corroded threads stuck in the masthead fitting to hold a bracket for the windex. The screws were over an inch long and nearly touched the halyards above the sheeves. Had to grind a metal cutting blade for the sabre saw down to less than 1/4 in width to squeeze it into the slots separating the sheeves.
Here's the bugger on the left. What a pain! Next drill and tap new holes for the windex bracket. Looking forward to removing the winter cover from the boat today.