Here is a Bluford Shops 86' boxcar in Canadian National colors. I took the weathering a bit farther than I had originally intended, but I like the way it turned out. Much better than the out-of-the-box baby blue paint.
Here are a couple photos that I posted a few months ago, after the fade coat, some graffiti decals, and the initial burnt umber oil on the sides of the car.
Here is a Grand Trunk version of an 86' box that I found in Ft. Worth, Texas earlier this year. I wasn't necessarily using this particular photo as my guide for the N scale CNA, but it provided some prototype inspiration. This is a 4 door model, and a different builder than the Bluford Shops version.