Ok,
Here's a thought...(or 2)

Tyson mentioned the L&N blue paint scheme...I believe that was introduced about 1964-5...?
Anyway, for at least 8 or 10 years after that, you could still see the old mineral red boxcars too...some with the original Roman font, & "Old Reliable" slogan, & some with the newer L&N lettering, & some with "The Dixie Line" slogan.
What I'm driving at here, is that when eras, & paint schemes change, it doesn't happen over night. It takes years, & it's not uncommon to see 2 or 3 paint & lettering schemes for one RR all in one train.
So for a group of modelers, modeling a wide range of eras, it would not only be easier, (& maybe more creative) to come up with different schemes, but in fact, more realistic.
(how in the %$#@ did Monica, & Perot make it into this thread?!)
