I've bitten the bullet and STARTED writing up a synopsis of freight car
paint schemes at:

http://www.union.rpi.edu/railroad/images/rolling-stock/Freight-Car-Paint-Sch
emes.html

I have a LOT to go, but if you have a favorite road and people
(specifically manufacturers) keep getting it wrong, like a scheme only used
on a particular class of cars, let me know. If you send it to me in the
following format:

<li> 19xx - Yadda, yadda, yahoo.<P>

it will get added sooner.

But even more important than what I've left out is what I got wrong. So nit
pick away. - John