Update from TrekCore:
Smithsonian Update: The Experts Have Arrived!
Greg Kerr sez:
Sounds like the perfect plan to me.
Smithsonian Update: The Experts Have Arrived!

Greg Kerr sez:
http://trekcore.com/blog/2015/05/smithsonian-update-the-experts-have-arrived/Our thinking is to restore the model to its filming appearance, with only the markings on the left nacelle, which were on the filming model, remaining. We don't want to open up all the holes and add fake wiring, but will have period photos of the model on the monitor.
The model will be in a big glass case that's temperature & humidity-controlled to preserve the model. How would you feel about a two-sided approach, with the case oriented so the "pretty" side is arranged to provide better visibility and "Kodak moments" for visitors?
The "pretty" side would describe the theoretical spaceship, while the descriptions on the other side would describe the filming model.
Sounds like the perfect plan to me.