Borek, are you suicidal? the F2 would definately first fluorinate the hydrocarbons, then would gradually exchange fluorine bonded to the hydrocarbons with free F2, and slowly begin to attack a non-resistant container.
That is, if the fluorine didn't just burn the grease on contact, although I don't think it would, I do know a film of hydrocarbon grease is only a temporary stopgap though to increase the life of glass ampoules.