I used to work for a nanotech company, and know a little of that area of science. One area of business was a fuel catalyst, basically a nanoparticle, far less than 1 micron in size of a component used in the manufacture of catalytic converters. It is notoriously difficult, even with the applience of scientific methods, to determine fuel efficiency benefits and its fair to say this caused the company a number of problems in determining the products true benefits. - You might understand that I have to be careful about what I say here....
I wouldn't want to be within 3 metres of nano powdered zinc metal without a 2000°F fire suit, in case it suddenly decided to convert to the oxide... and that goes for several other metals.
As for acetone, as Bill commented, it is a very powerful polar solvent, and I'd not like to have it eating away at the seals and lines in the car....
Think I'll stick with whats available from the pump, even though that is far from ideal these days.
Ed
I want my MGB