Try and do a wash with black acrylic in distilled water....itll darken it up a bit....but...yeh it does APPEAR lighter then it should be, could be its too light or just not having the red throwing off the color...what red are you going with ?
Yeah, I had great success doing several acrylic washes on my ESB. But part of the reason I'm debating more mists on this one is because of how bright the Humbrol Silver is. It's BRIGHT. I'd like it to be a little toned down. I may even look into using an aluminum variation in the future. As far as the green, all of those pics were taken in sunlight, and after bringing it indoors, the green has a much more drab tone. So we'll wait and see.
As far as the red, it'll be Floquil Caboose, no question. I bought several bottles of it a few years ago. I know that one of our color lists for the ESB calls for Caboose, but I've always thought that it's much better suited to RotJ. That's the main reason why I used Jayvee's Humbrol mix for my ESB. The ESB always seemed to me to be more red than maroon.