I would be wary of using acetone for several reasons.
First, it could soften any finish on wood (or anything else it gets spilled on). Secondly, acetone that is commercially available is typically loaded with impurities (lab grade or pharmacutical grade is purer). When the acetone evaporates, these will be left behind and you have no control over what effect these may have on your gun. Thirdly, in addition to removing water it will likely remove most traces of oils (that you want).
Alcohol will remove these as well, but I don't think will have some of the other effects that acetone might.
Just one view.
Hank