As previously reported I recently purchased the Doc O'Brien Weathering Powders from Micro-Mark. This morning I weathered two New Haven engines to increase their realism. Using the powders and some dry brushing of the fuel tanks, couplers and trucks.
All in all I like the way they look. I'll continue to experiment on my rolling stock and other motive power. I also plan to try the powders on structures as well. That's it for now. Thanks for reading!