interesting method. can't figure out the danger (so beware) and if it's suitable for other materials. But the result is great http://3dprinting.com/news/making-your-3d-printed-abs-parts- smooth-with-a-vapor-treating/#.USzNxI4S_1U.twitter
This is the old white glaze. You probably remember cream which later was changed to grey robust and then killed. There was a smooth test named white glaze using the same machine loaded with ABS. Minifigs was mentioned in the post with more glaze photos, as it starts with poor detail and them blurs it even more.