Copic Cravings

I've been "craving" a Copic day for quite some time now, and finally got them out a few days ago. It's not finished, but I need some advice from my crafty peeps...

How would you "colour" the crown? Tempted to outline with a fine-tipped gold pen/marker, but I don't seem to have one in my stash. Thoughts? There's always Stickles, of course, but I need to broaden my range!

Work in progress...CRP164 Cling Mermaid Kiddo (Stampendous) stamped in Memento's Tuxedo Black ink and coloured with Copic markers. (Message me for a list of colours!)