Oh, yeah - now that looks like a train - though not all cars look that dirty at any one time - something I have to keep telling myself. Very good job - better than my typical work. Did you use an airbrush, weathering powders, some dry brushing? Combination?
2 things: the orange couplers on the first(?) hopper...and the apparent airbrushing truck frame "ghosts" on the rolling stock wheels...(been there).
No rod ghosts on the loco's drivers though - excellent, and a pain to work with.
Keep it up. Show us more.