VHT nightshades wont look good from my research, it will darken the area and render the reflection useless giving you practically no lighting.
use the flat black on the non reflective areas. Example from regal gs:
ben from regalgs.org recommended to use a flat black Testors model paint to paint everything. Thats what he uses, he paints them but charges $85
more pics on this thread:
if you decide to use projectors you could paint the area since you dont even need the reflective surface.. but I imagine trying to setup how to mount projectors will be a bitch and a 1/2