I use it for bare wood a lot and have never had an issue. For a brief moment before it dries it will give you a glimpse of the finished colors and grain too.

  Vinegar does stain Okume, don't ask me how I know.

I too use denatured alcohol on naked wood.  It evaporates without leaving any residue so is excellent for preparing bare wood -- epoxy or varnish.

Thanks for the reponses. 

 I thought it would be fine, but since I haven't built a boat in a while just wanted to double check.

RichMPL