Along GJZ's line, I've used Feibings alcohol-based leather dyes on wood both pre- and post-finished wood with good success. On finished wood you can wipe it off quickly if you don't like it. You might also consider a spray bottle loaded with rubbing alcohol....lots of uses around the shop such as degreasing, dewaxing, raising the grain on unfinshed wood, etc.

Good luck and let us know how you make out.

Phil