A quick and simple method to get rid of the plastic new freight car look is to spray a light coat of Dullcoat.  This will take away the 'toy' train look of your layout.  If you don't have any Testor's Dullcoat you can use any Matte Finish spray to get the same results.  Just a simple spray to each side and let dry.  This can be done to any plastic kits also.

Micro-Trains Military Barracks Build by Modelersguild.com

Building this Z-Scale kit was a real pleasure. The parts fit nicely, the materials were right, [ ... ]

I finally decided on the Zize of my layout. A mere 30 inches wide, L shape, length 77.5 inches on the short and 126.5 on the long. Now I've just gotta come [ ... ]

Here is the deal. IF somebody wants me to make figures, they have to be SPECIFIC. If you dance around the subject and hint you want hookers,or anything [ ... ]