Not so very green

[faraway]

ED, I did just a test with 1:1 black wash on a Exact waffle car and it showed nasty drops. Increased alcohol to 5:3 and it worked fine. Than used the same black wash on the backside of the green hoppers (rust spots have been added too) and it did clearly dissolve the layer of green Tamiya paint it did last night. That is the course for the white/light gray strips.
My conclusion is that there is not ideal formula for black wash. You have to know the sensitivity and smoothness of the base paint.

That is my final green train