You could use some Potassium Permanganate or Potassium dichromate to fast age the wood if the basswood is to bland.
There is a chemical reaction between the Permanganate and the timber/oils which results in the accelerated oxidation that should darken the grain some what, less messy than stain IMO
examples of Dichromate in action
http://www.bt3central.com/showthread.php?t=27343
Neon Gecko did a comparison test with both these chemicals a few min ago....