Here’s a recent pic of my Broadway Limited DCC QSI Helm leasing loco 6388 that I easily changed the lettering to represent my Soo Line locomotive. Albeit its not a GP38, but an SD40-2 but oh well, close enough for me. I’ve also included a soo line caboose I modified and painted.
Lake States Transportation is my absolute favorite era in railroad history! Are the decals from Switch Yard, or something else?
You also need a Walthers SOO Line (Platinum Line) Soo-Milwaukee System caboose to go along with those Ugly Pumpkins (aka.Bandits) to make them stand out. The brown cabooses are nice too.
If you’re a little hesitant about weathering the body, just do the truck side frames and the fuel tank. Amazing what a difference it makes. I’ve used the airbrush and the “paint wash” method with a bristle brush.
Rule of thumb: All strokes are vertical. Even for a klutz like me, either method was a piece of cake[;)]
There was a bunch of ex-MILW SD40-2s that looked like that before the Soo returned them. IIRC, only one MILW SD40-2 got repainted into Soo colors (6309 after repaint). The rest looked like your model.