Curt, since you do the 'Friends' web site which includes the roster, I'm wondering if, after the newly painted cars are lettered, you could induce Carlos to take a picture of each of the repainted cars and send them to you to put on the roster. It would be a nice addition if not too much work for you.
This would then give everybody a chance to see exactly which cars have been painted.
By the way, in discussing red vs green, it should be noted that the Antonito parlor car was already red and, I believe, was one of the first to get repainted. This makes it impossible to have an entirely green Antonito train.
I really was not trying to promote the two-color idea anyway but was just curious.