Comment Re:Fnord! (Score 1) 175
Acetone isn't really *that* nasty. It certainly beats acids, or substances that create strongly poisonous fumes. You'd have to try hard to get anything more serious than a migraine from acetone fumes poisoning, and while it's certainly not good for your skin, washing your hands after finishing the work is good enough - no need to panic if a drop lands on your skin. Sure you should keep the container tightly closed and you need to watch out with fire, but it's really hardly worse than gasoline when you work with it.
Yes, the difference between size of detail you want to retain and size of the 'ribbing' you want to smooth out should be large - if you want to smooth a tiny figurine that won't be too helpful. If the object is a cast for a large silicone piece though, the loss of detail will be insignificant. (and if it's gravity that smooths it out, you're already too far and destroying the piece. It's surface tension that should do the work.)