I recently assembled two Proto 2000 Automobile Double Door 50' Steel Boxcar kits. I want to paint and letter them for the GTW.  What was the color of the under frame and truck? I made a search on the Internet but found no clear photos of the prototype. In the same era, CNR boxcars were some Boxcar Red all over, body, under frame and trucks. What about the GTW?

I see some RTR models with Red under frame, other with Black one, all with Black trucks. But every modeler knows that even the best RTR are not always prototypical.

since CN took over GTW in the twenties I would say that color schemes would be the same check out fallen flags.