Alamo,
One of my Bulgarian "unissued" Makarovs was packed in the cosmoline. This is how they were packaged from the factory.
If the pistol was issued and then returned to the armory for storage, it was first cleaned, then lubricated with "rifle lubricating oil", wrapped in one sheet of acid free paper, two sheets of wax paper, then packed in a cardboard box. This is per the original Soviet field manual.