I've a dozen N scale WoT 60-C-4 "Harriman" coaches in front of me that I'm modifying for "as build" windows and appearance and will be decaling for the San Diego & Arizona. So I've started to consider decals.
But given minimums, etc, considering ways to "spread the cost" and design the screen to include letter boards that have never been produced. Microscale did an SP heavyweight pass car letter board, but never any of the associated lines and as we have the SP "Given" font, so starting a list of lines to include: Texas & New Orleans? Illinois Central? Other ideas? They will be "gold leaf" color.
Cheers,
Jake