If we don't start from the presumption that authorities are rather authoritative when speaking about topics in their particular fields of study then we're doing something wrong.
Doing something wrong appeared to be the case in the Ed Miarecki work. The NASM & Miarecki's choices were deliberately incorrect. Take another look at this line from the linked Air & Space article on the latest resotration:
As Margaret Weitekamp, curator of the Museum’s Social and Cultural Dimensions of Spaceflight Collection, explained to an audience of Trek loyalists at a public lecture last night, the model was initially regarded more as a piece of decor than as an object deserving of preservation and scholarship in its own right. That distinction influenced the approach taken during its most recent restoration, in 1991, which included a new paint job and detailing intended to help the model live up to the memories many visitors have of the starship they originally saw on tiny, primitive TV screens. This is different from trying to make the model look as authentic as possible, or closest to its condition when used in filming the TV show.
The fan community has been critical of these efforts to improve the model’s appearance, Weitekamp said—and she sympathizes with their grievance.
So not only was this a case of making a historically inaccurate choice (in other words, not matching the final revisions made for production of the regular series), but Weitekamp acknowledges the fan complaint, which--again--begs the question: were / are the fans wrong?
If they are not wrong, then a couple of generations' worth of amateurs know what the miniature requires to be production accurate.
And why are they better qualified to offer opinions than people who dedicate their working lives to the problem of keeping historical artifacts in the best possible conditions that balance their histories, their cultural value, and the things which historians and the public of the future are most likely to want to have preserved?
See the quote, and Miarecki's work. The decades-long complaints and this conversation would not exist if those in charge of the restoration leaned in the direction of historical accuracy.