I am cooking my prints in acetone vapour. The result is awesome: http://www.thingiverse.com/thing:191495
If you want to use a gas stove to boil the acetone then make sure there are no acetone vapours around (no stink) when you ignite the flame or you will make a HUGE fireball all around you. It's harmless but scarry.
The idea is:
1: boil some acetone to make vapour
2: let the vapours soak into the model
If you mix up the steps (soak acetone into the model and THEN boil it) you will get bubbly surface: http://www.thingiverse.com/make:54865 which is awesome too!