Cited as a reference
Worst Case Scenario with a Acetone Vapor Bath
Why people recommend it
Shows what happens when an acetone vapour bath catches fire, cited to argue that the fire risk of ABS smoothing is smaller than often assumed.
In their words
Contrary to what the other answers suggest, the risk of fire is not that great.
Tom van der Zanden on 3dprinting.stackexchange.com, Jan 2016. CC BY-SA.
The way it burns is not that dangerous also taking into acount what a thin layer you will be applying
Leo Ervin on 3dprinting.stackexchange.com, Feb 2016. CC BY-SA.