What you seek is krytox ....
http://www2.dupont.com/Lubricants/en_US/index.html
http://en.wikipedia.org/wiki/Krytox
Small tube will last a lifetime for your skateboards and concerns you brought up in your post.... Primary use in my profession is o-rings an high tempatures . Very good product .
This is link to product I use....
Hope it helps....
Krytox? Dupont Krytox??!! No question it must be good stuff. At $61 for a two-ounce tube I can’t afford to use it on Motorcycle chains but I do like to baby my handguns and of course I spoil my new 40-inch Gravity Mini-K Longboard skateboard that sports Gravity Blazer 70mm wheels.
Many thanks for the info.