Actually I was thinking since I have to paint the dials on my dash anyway wouldn't it be neat to do nearly the same thing to it? I'd use yellow or orange for a luminscent, then it'd glow so much brighter as well. The only problem is I don't know how well these colors would look with normal daylight and I don't think the blue or green glow would look very nice.
http://www.glowinc.com/pigment.htm