Yeppers........WD=Water Displacement, 40 is the formula code. First used on rocket outer stainless shells by Air Force. Definitely not an actual lubricant, and eats into steel base metals
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Yup, works great to polish aluminum, using power tools of course, it's not *that* abrasive. Made a lot of money thanks to WD40. For a while people were spraying down squeeky automotive AC conditioner compressors with it, cha-ching.....
The guys I work with will spray it on anything that squeeks, so much so that I hide it now. Caught one guy trying to lubricate a high speed fan motors bearing with it, I grabbed it and handed him my old pump oil can. It's great for pivot pins on the excavators and such, eventually they will get packed tight and won't take grease. Pull the zerk, clean out the hole with a small drill bit, fill it with wd-40, put the zerk back in, wait a couple of days....it literally grinds through the rust and crud. WD40, great lubricant on slow moving, light load stuff, but that's about it. Unless you happen to own a missile silo..........