Hey - There are so many lubricants out there - and greases, pastes, cleaning solvents, etc. Soliciting thoughts from the peanut gallery (so to speak) - to see what crosses over from servicing other electronics. Curious to their effects on pinball machine parts and what is good / bad for parts. This might be a helpful refresh on the topic as new products have been created.
1.) VCR lubricant designed for motors - comes with a needle tip and you only need a small drop. (Moving parts like spinners)
2.) White Lithium Grease - (Spinning parts)
3.) Spray on Silicon - (Coating moving parts)
4.) Fader Lubricant and cleaner (Guitar Center, for mixing boards) more like a cleaner, less like a lube..
5.) Tuner Cleaner and Lubricant
6.) PB Blaster Cleaner
7.) Flux Cleaner (For PCB's and solder, removing Chipquick Flux, etc)
8.) Electronic Parts Cleaner and Lubricant
9.) FerroFluid lubricant (used in speaker coils)
10.) 20W40 (Topic Above, answered)
11.) 3 in 1 Oil
12.) Thermal Grease / Paste - (White paste used as Lubricant - designed for FET's with heatsinks)
13.) 99.9 % Rubbing Alcohol
14.) Canned Air (good for most things - any ill effects?).
15.) Guitar String Cleaner (made to make metal glide, not really a lubricant more like a metal coating)
16.) Carb / Injector Cleaner.
17.) WD-40 (Topic above, answered).
18.) Liquid Wrench.
19.) Lucas Oil.
20.) Window Cleaners(Windex, Winshield washer, bug free).
21.) Headlamp restoration kits (For renewing old yellowed plastics).
22.) Chipquick Flux for soldering (Makes Hi Temp lead-free - ROHS soldering a breeze with a modern good iron - 900F -Flows Like Honey)