Ever notice how kit chrome looks a little too...toyish? I've got news for you
All I do is take some acrylic black paint, and pretty much soak all the chrome in it. Then once it dries, I wipe the black paint off.
Here's the difference:
(One on the left is stock chrome, one on the right is after the black wash)
It really tones down the chrome and makes it look more realistic. But, unfortunately, I haven't figured out how to get rid of the sprue attachment points