Sydrol on you ****** is even worse - when I got my A&P they used to tell us - take "our" word for it - you need to wash your hands prior to going to the watercloset when working with Skydrol - US military Ive been told still uses mineral based oils . Skydrol is one of the few note worthy things developed by McDonnell Douglas .. the other things do not include Harry Stonecipher by the way ..