Here are two photos of CSX #6367, one from 1986 and one from 1989:
Here is my finished model. While I didn't try to match the weathering to one particular year, I went for a general grunge approach. Although I did want to include the big oil leak on the long hood.
I used a combination of airbrushed inks, dry brushed Vallejo acrylics, chalks on the roof and some rust pastels. I haven't done this type of modeling in probably 12 years and I must say I have really missed it, and I'm having a blast!