Another thing,
I've found a great way to clean my hands after playing with filthy old gear oil, is to rub them together with baby oil for a few mins. The baby oil penetrates the top layers of skin, and bonds with the gear oil which has done the same. Then plain old liquid soap handwash can bond with the baby oil, and it all goes down the sink. Also does away with the need to scrub for 20 mins with a bar of soap, which removes all the natral oil from your skin. So your hands aren't left dry and sore. (Or stinky!)