I forgot I had these in my photobuscket still... here's the plane I was talking about:
Before:
After:
you can see it muted it somewhat... I sprayed the uppers with middlestone with a dab of light tan added with about 90% thinner, and the lowers I just used the same thin mix of the light gray and hit the demarcation line between the colors... it helped blend the two together...
---edit---
as you can see in the second shot I it on TOP of the decals as well to fade them out and not let them look so vivid....