OH WOW, Now you've gone an done it Andy. Time to put on your big boy pants and show us how to glaze properly.
I'm going to suggest you start with some glazes of a lighter brown than you'd expect and also twice as thin as you'd normally go. My view on it is that you want to keep the metallic sheen BUT use it as the crowning highlights.
Going back to my memory of "TROY" (that's the movie, not the siege, Thank You!) Brad's armour was a rich brown in shadow like Burnt Umber, so it might be a case of gritting your teeth and going another step up the ladder to use water soluble oils. (Combined with W&N odourless medium and it dries quicker.) That will get you rich tonality in the shadows without too much loss in the metallic sheen. (Add a hair drier for quicker results).
Now, when it comes to verdigris, think on this; Achillies was a warrior and his armour was paramount to his survival, so he'd have taken extreme care with it, oiling it and polishing it as soon as he had 'down time'. To me it makes sense that there would be very little green showing and that scratches and dents would be buffed out.
