An easy way to enhance the look of any diesel locomotive is to blacken the grills and vents to provide more depth.  You can use a black wash to bring out the grill or vent details.  Weathering powders are extremely effective bringing out locomotive vent and grill details.

The sawmill has a permanent place in our hobby as an industry built in the sticks. The location of these structures usually is located far from civilization [ ... ]

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 [ ... ]

My layout is called the GREAT WEST ROCKY MOUNTAIN, KENORA-SUDBURY RAILROAD COMPANY. The general scenery is modelled on my hometown, Kenora, Ontario as [ ... ]