Yes, back to the question. Red fades and was a problem. But, B&O "Devils Red" maybe late 1930s and NKP post war I am pretty sure. PRR, NYC, et al, stayed with the more brown color (this is best way I know not to flame the fires of PRR folks, apology is extended).
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-------- Original message --------
Date: 7/4/21 3:16 PM (GMT-05:00)
Subject: Re: [EXT] [RealSTMFC] caboose colors
In the Coast Guard we called zinc chromate "green death". The drill was
Chip, Paint, and Soogey. Chip off the old paint until you got down to bare
metal (using a chipping hammer), paint it (zinc chromate, red lead, and lastly
color), and soogey (keep it clean by scrubbing with a stiff brush and washing
the dirt and soap into the sea. One of the primary tasks of anyone with a
Seaman's rank and even a few 3rd class Petty Officer's from time to time.