I wouldn't dare take mine apart to refinish it.
But if you are familiar with furniture care and are *very* careful, and patient, you can slightly darken the light wood face and arm using furniture polish products.
It will take time and multiple treatments, but never pack the instrument back in the plastic bag and case without thoroughly wiping it off.
Also if you ever get gaffer's tape gunk on your instrument, regular furniture polish will help remove it.
hth