Boeshield (developed by Boeing Aviation for long-term protection of aircraft components) coats and protects steel, aluminum and other metals. It works by penetrating into the metal's surface, displacing any moisture present and drying to a waxy waterproof film. Treatment provides several months' reliable protection for any tool or machine. To remove the film when it's time to put your tools back into service, just spray on a fresh coat of Boeshield and then wipe off thoroughly.