Rc Fuel Faq
I will try to research that one a bit, however I believe that Acetone is hygroscopic (absorbs water from ambient atmosphere) like methanol. If in fact my beliefs are correct, it would probably not serve the purpose of reducing the water absorption affect of methanol.
I realize that many home brewers use it as a flame speed modifier to help idle with low or zero nitro fuels, and to some extent it works just fine in low percentages for that purpose.
Fuelman