I would make it a shade darker, give it a weathered look
like slight "ionization" maybe?
the rest I would leave to light play.
Which program are you working texture in..PSP, or can
you port to True Space to directly paint faces on the mesh? still it can stand good as it is too
_______________ "the brite good morning voice, whose heard but never seen"
Excellent render, JanReinar. I like it just as it is, but agree with the others, as to playing with darkening the texture or playing with the lights. Looks great as it is...