I knew it all along!!! Pardon me while I gloat for a few hours!
Seriously, Mike, when in doubt ask the nice folks at Caig what they recommend. They have a vested interest in your success.
I have seen their stuff rejuvenate switches and pots that I would have sworn
were far beyond redemption.
Another cute thing that will happen to folks who use a silicone lubricant will
find that they cannot repaint any surfaces that the silicone has come in contact. Years ago auto folks recommended silicone polishes for long lasting
shine. Then when collision repair or other body work became necessary,
they had to apply a "silicon killer" to the surface(s) to be repainted or the
paint would simply flake and fall off!
Enjoy your Collins gear for many more years. I would fire it up regularly
though just to keep the electrolytic caps from reforming. Just another
friendly "gotcha" from Chemistry in electronics.
73, Cal K4JSR CET