If you have metal around and you want to protect it from the elements and rust, this is it. Spray the insides of the tubes on steel frames to stop rust. Use it where you might otherwise use WD-40 to stop squeaks in door hinges. It's also a super chain lube our No. 1. Developed by Boeing to protect airplanes. It dries waxy, and works great. A 12-ounce can, which is what this one here is, rustproofs seven frames and lubes a dozen chains. Nobody here would want to be without it.