Thanks everyone.
Carl, I wound up using a color called Depot Buff by Floquil/Polly S. It is a water based, dead flat paint used in model railroading. I clearcoated it with Model Master gloss clear enamel.
John, be patient...... at least it's painted and clearcoated now.
Tom, you're right in calling it "baby poo". That's exactly what we used to call the color of the real car. I'm being patient with this so I can try to get it looking as close as I can to the 1:1 car.