Might I suggest a second hand store, Salvation Army or Goodwill?
Cheap enough to experiment on and you will be supporting a good cause.
The co-worker who first recommended Fluid Film to me claimed that NASA uses it as a lubricant due to it's ability to stay liquid in below freezing temperatures...like that found in outer space.
I asked another friend about it who used to work for Teledyne Ryan as a machinist back in the 70's and 80's. He still has friends who worked for Teledyne Ryan as well as Grumman back then and confirmed the use of it in aircraft as well as some satellite equipment.
That was good enough for me to research where to buy it and get some. I have yet to be disappointed by it.
