STUDENT Wrote:
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> Can't handle the inside, but stock car exteriors
> were freight car red until application of the
> flying RIO GRANDE in 1940 when the exterior color
> was changed to black.
This is incorrect. The change was made in 1937, not 1940. This is known from a 1937 telegram instructing train masters not to load any red painted stock cars and immediately forward all of them to Alamosa to be painted black. The Flying Grande herald wasn't created for another two years.
Before 1920, all stock cars were painted Princes' Mineral or Prince's Metallic (same paint, just different branding on the tin). Freight Car Red was introduced about 1920 and was supplied by Sherwin-Williams and Kohler-McLister.