Just a couple of examples of the liveries one would most often see on the CRR in the 70s. Now, on US freight lines you can see cars from just about every railroad- they get mixed up a lot - but the majority of the cars on the Clinchfield, besides their own, would be bridge traffic from the C&O (link at Elkhorn), and Seaboard and Southern (link at Spartanburg).
Perhaps, but I put it here because this is where the train painters hang out. Besides "Suggestions" is really for suggestions to DTG, not the community.