My very first attempt at weathering a locomotive. Man this took some serious time to master... This RDG GP30 started out as a Proto 2000 and was my very first locomotive that I bought and what started me on the path to modelling the Reading Lines.
In the end it took about six attempts to get it right, fortunately when you Dullcote first and make a mistake you can get back to painted shell with a stiff brush and water!
So in the end the shell has been Dullcoted first, then grimy black to the roof around the exhaust outlet and fans, I sprayed a very fine mist of grimy black over the entire shell, then thinned this out with white spirt. Then another coat of Dullcote, followed by a dusting of Dark Rust AIM powder, then another coat of Dullcote, followed by the Burnt Umber oil paint to weather, and lastly the final layer of Dullcote.
The trucks were sprayed with grimy black PS paint, then had Dark Rust AIM weathering powder added to the entire truck, followed by black AIM weathering powder to add the highlights.
Last thing to do is add the railings back after they are weathered.