40-foot Stoughton trailer, Superior Freight (SFZ 8540).  This decal set from Micro-Scale always has been one of my favorites, so when the Micro-Trains undecorated trailers became available, this was one of the first models I finished.  I airbrushed the body in Accu-Paint jade green, then masked off the roof, frame and door hinges and airbrushed those areas bright silver.  The electrical area on the nose was masked and airbrushed a medium gray.  The marker lights were highlighted with Testors Turn Signal Orange or Stop Light Red, whichever was appropriate.  I decorated the model with the Superior Freight decals, and oversprayed with a satin clear coat finish.  the wheel bogie hardware, tires and trailer stand were painted flat black, while the hubs were painted a gloss brown.  The mud flaps were painted gloss black with a little flex agent added, and the flap decals from the set were added, which covered up the molded-in Fruehauf markings.  The trailer was weathered lightly by with pastels, then the diesel exhaust residue on the roof and upper front corners was airbrushed with a black wash until the desired build-up was achieved.