Re: Lube for hinge pins?
Spline grease is great for splines, but like 24C it will make gimbal bearings slide and not roll. Just too thick and sticky (Unless you get that cheap, watered down, thin Sierra stuff).
I had 2 grease guns as a tech. 1 spline grease, the other gimbal bearing and ujoint grease.
steering and hinge pins don't care which as long as it prevents corrosion and makes things slipery.
I also had small tubes of 2-4-C and 101 and a few others for different things, but they didn't get much use.