04-19-2012, 09:10 AM
My understanding is that TTX/Railbox uses different shades of yellow depending on the shop doing the work, and probably also the original builder (since a lot of their equipment has original paint 20, 30, 40 years later). "TTX yellow" is basically "equipment yellow" or "Caterpillar yellow", and I use Floquil TTX Yellow for construction models, too. Your best bet is to go looking for whatever shade of paint from any manufacturer is the best match for the model.