Was drilling holes in ordinary steel last night, only two holes wasn't going to go find the thread cutting oil. 2nd hole going a little slow, looked up at the assortment of cans and thought - CaseIH Industrial Strength Penetrant - what would that do.   I was impressed, the chips flew, finished the hole quickly.   Now I have to wonder, is that an off label use, maybe HagenBrew needs a revised list of uses....