Check this out:
"Direct liquid immersion cooling for high power density microelectronics":
http://www.electronics-cooling.com/1996/05/direct-liquid-immersion-cooling-for-high-power-density-microelectronics/BY NO MEANS USE ACETONE to clean any circuit board. Acetone is a strong solvent which can remove paint and other passivation "stuff" on the circuit board. It will attack the plastic associated with any SMT component. I would try IPA first.
Safety:
From wikipedia: "At temperatures greater than acetone's flash point of −20 °C (−4 °F), air mixtures of between 2.5% and 12.8% acetone, by volume, may explode or cause a flash fire."
Tend to agree regarding the fact that acetone may attack a bit the circuit board.
However regarding the explosion, that's total bullshit (assuming a normal use)
You will be dead long before it explodes if there is an air mixture between 2.5% and 12.8% acetone
(knowing that there is only 21% of oxygen in air)
(reading wikipedia is good, understanding what they say is better. )
Pure acetone is commonly used to clean equipment used in organic chemistry... (as it is a solvent for many organic compound)
I'm very well aware of the use of acetone and it's safety issues. Acetone is a useful solvent for many things, not just the insignificant world of organic chemistry. Left unsaid by you, is that the "professional" use of acetone is done in well ventilated labs with fire extinguishers and fume hoods with a minimum air flow.
Given the wide background of the readers in this forum, some/most at home, in a space with no outside ventilation, there is nothing wrong with being careful.
One of the many uses of acetone is to remove the plastic IC packaging, hence the circuit board warning.
