I have 2 Russians, somewhere.. I can not remember if the internals were greaseless, they really aren't my thing. but at the same time, Yugoslavia pulled and inspected frequently as well, as indicated by log books, and they used quite a bit of storage grease. Some difference could be dependent on local climate of said storage locations. A humid temperate area may require protective grease, a dryer more arctic location may not. And I'm sure the black paint Russia used was used as a replacement for a corrosion inhibitor suited for the climate.