If I remember correctly, several of our members have expertise in lubricants...
but I don't remember which members
When I get a camera from an FSU seller which is a bit stiff, I've been spraying an industrial "light oily contact spray," made in Israel... especially near to the advance knob mechanism. Then, I'm careful to wipe up any residue with a cloth lightly dampened with alcohol and water. There is very little oil in this stuff; I can feel that
on my fingers, and it works wonders.
Is this an OK practice, and if not, what's an alternative?