Rear oils seals off, and all inner races removed, revealed that all outer races are most likely in need of replacement, and so will put new bearings for all.
Here's a view of a corrosion pit in one of the outer races. All were different: one had as indicated below; one had discoloration and grooving; one had several gouges from possible a metal shard; and one had scratches.
Both hubs apart, with their bearing inner races aside. Next will be to remove the inner races, thoroughly clean the hubs, install new bearings, and then paint the hubs. After that, on to the swivel mounts.
