On Monday, January 8, 2018 at 2:33:59 PM UTC-5, Bob Kuykendall wrote:
We wax our pins twice a season, usually once before winter storage and again in the spring, mostly for corrosion protection. During the flying season we use whatever slippery comes to hand, usually the same grease as we don't use on O2 system parts.


--Bob K.

I've used plain old Vaseline petroleum jelly for 40 years or so with no known bad effects.
UH