Here is a little hopper project I did tonight. This is a Bowser 3 Bay 100 ton hopper lettered for C&O. These could still be found running around the coal fields during the early CSX years. For weathering, the inside of the car was lightly painted with Krylon Camouflage, for the car sides, ends and underframe I airbrushed a wash of Vallejo Earth along with some pan pastels. The trucks were done with the same brush painting and chalks I've used before. With the addition of a few decals I think it will work fine for the layout. While it's no contest model, I think it will look great in a long string of hoppers.