Re: The 11-foot TOS Enterprise model-
Considering the complete lack of any weathering like we see on the top of the saucer (and in the episodes), it sure looks like it got repainted to me.
Yes, the top of the saucer - after the filming of "The Cage" and "Where No Man Has Gone Before".
"The first duty of every Starfleet officer is to the truth, whether it's scientific truth or historical truth or personal truth! It is the guiding principle on which Starfleet is based! Jean-Luc Picard