I can see where you going with this, and with a little bit of work your aged metals will look fantastic, but as it is it's looking quite patchy. The gold on the other hand looks like it's straight from the pot without highlights or shading which leaves it looking very 2 dimensional although both these problems could be solved with inks. A thick(ish) wash of brown ink would work wonders on the gold staff and a thinned black wash would really bring the stippled effect of the silver together.
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