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.

Micro-Trains 2 Story Barracks Build by Modelersguild.com

These Micro Trains kits are nice, real nice. A few nights build time and you have a piece for [ ... ]

Adding Panel Lines to ACF Hoppers
Bill Mock
January 2010

Here's [ ... ]

Hopper Weathering Clinic II
By Bill Mock
December 2009

So here's how those BN Hoppers turned out after the surface rust dried. Not bad. I'll [ ... ]