@Ryan Selvius posted:.........As for white walls, locomotives really only had them when they left the builder. After a couple weeks of service they were gone and railroads didn’t repaint them. They look sharp but if you want to model SP operations they were only present when the locomotives were newly delivered.
That may have been true for most SP GS engines (as it was for some other railroads), but back when the previous GS models came out there was extensive discussion about the whitewalls, and several photos were produced showing some whitewalls still appearing on a few active GS engines sometime into their active service lives. At some point, though, all the whitewalls disappeared.