Museum aircraft are a last resort for reference. Only "warbirds" are less reliable. What guy is gonna fly around in an old beat up looking warbird that he has spent millions on restoring and maintaining?He is gonna want his toy to sparkle. Hence the high gloss polished finishes and brighter than normal service colors that you usually see on those. Some are more faithful than others to how close to original service condition that they are displayed in. Unless the aircraft was taken off the flight line "as is" in whatever year, rather than salvaged from somewhere and restored, fidelity varies. Museum aircraft are fine for dimensions, details such as scoops, wheel wells, etc. But paint, no not really.
Even Robin Olds' F-4C displayed at the Air Force Museum has some later add on modifications that it did not have when he flew it in Vietnam. While that aircraft was painted to be as it was in 1967, it was not "back dated".
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM