Unless you go the customized route for decals, you can purchase N scale decals to help decal your rolling stock, bridges, buildings, or locomotives. I usually find my N scale decals at train shows. There is always someone clearing out their N scale decals of what they have left or will never use.

Is so awesome!! Not exactly prototypical, but Milwaukee Road none the less! So glad someone made this!!

 This is Micro trains Line SD40-2 Santa Fe model which I customized with working ditch lights.

Here's a pic of the six, so far...