A product I encountered in the chemical industry is called "Never-Seize." It is a mixture of powdered aluminum in a medium oil. It is used as a thread coating in a variety of applications to prevent rust or friction seizing. It seems that this would be a useful bicycle accessory on such things as stem binders, crank fixing bolts, spoke nipples, and perhaps even seatposts. Other than being somewhat messy if you get it on you, is there any reason not to try this?