Thanks for the suggestion.
The metal I used was Mithril Silver, washed with Nuln Oil. I didn't want to brighten it up too much, as I've already got a lot of white going on, and the bright silver almost blends into it if I go with a straight from-the-pot application. I did a few touches on the Jacks, and on Helynna's halberd [you've got to look really close] but I found I was losing too much contrast with the white on the rifles, so I decided to leave it alone. Plus, all that extra work!