Milkstone remover by Dairyland works real well, although keeping the mixture temperature maintained 80 deg or more for 24 hrs works the best.
It is available at most farm/ranch supply stores by the gallon and much less than the advertised rust removers that have come onto the market.

Is there a cross reference # for the ACE 100 wheel bearing seals to purchase at a local auto supply store?
Want to grease the wheel bearings and replace the seals, in a hurry and prefer not to wait on an order.