Chicago & North Western Historical Society Modeler Volume 10, #2
Roof-top photos of several C&NW GP50 locomotives.
Preparing a Brass Diesel for Painting and Operation
Model Railroader 1984-04
This article describes how the author painted an HO-scale Hallmark Santa Fe GP50. Before painting the author stresses making sure the model is a good runner by discussing couplers, tracking and traction, electrical pickup, and thinking about super-detailing. The "Paint Shop" column on page 114 of this issue shows the final result and includes painting instructions.