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Charles Hostetler wrote:
"This is just my personal opinion - not expert in any way, but to me
these fancy multicolor schemes suggest some sort of special LCL or
merchandise service, and they seem sort of out of place with their
box car red compatriots."
...WHICH WAS THE WHOLE POINT! While not all of these colorful cars were specifically equipped for LCL service (the vast majority of LCL moved in ordinary boxcars), they were advertising various LCL or other expedited service, and the fancy schemes were meant to be eyecatching (and nowhere near as common as modelers believe).