Yes, I read the wiki after my comment. I still stand my recommendation that people avoid using acetone for Rit dying.
My issue is not whether it works, and I won't argue that empirical evidence seems to point that it works well. My argument is that the health and safety risks of generating acetone vapors far outweighs any need to take a shortcut in customizing figures.
Understand that acetone is not "made to be in contact with our skin." It's a toxic chemical that we use as a beauty product...that does not make it safe. Regardless, my issue with it is generating flammable vapors and breathing in vapors, which has more serious health consequences that skin contact.
Before you dismiss acetone as "not that toxic", you should probably review what the CDC has to say about acetone exposure, and its short-term neurological effects and possible long-term neurological, kidney, and liver damage.
http://www.atsdr.cdc.gov/toxfaqs/tf.asp?id=4&tid=1 You should also review what the Canadian Centre for Occupational Health and Safety has to say about acetone, paying particular attention to its very overt warnings not to generate vapors.
http://www.ccohs.ca/oshanswers/chemicals/chem_profiles/acetone/working_ace.htmlWhile the writer of the wiki is taking some precautions by using a crock-pot outdoors, he is still (literally) playing with fire by using acetone.
Closed containers may rupture violently when exposed to fire or excessive heat for a sufficient period of time. Even dilute solutions of acetone in water may be flammable.
Heating acetone indoors is very irresponsible, no matter how many windows you have opened nearby.