Patrick,
I can't explain why the acetone does'nt evaporate before it's job is done but all I know is it works. Most commercial penetrants are petroleum based and ATF is not only a superb lubricant but a great cleaner as is the acetone. Maybe someone among us has an advanced degree in chemistry and can chime in. I mix the solution and store it in a little plastic bottle called a "Zoom Oiler". They can be found at most commercial refrigeration supply houses and at WW Graingers, which are found in most cities.
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