I covered the outside of mine with more PC, and fancied it up with stamped PC, faux silver leaf, and a little acrylic paint antiquing. It could use another coat of clear acrylic because the leaf is flaking in places, and I may even do that someday.
Seriously, I could look at pictures of paintboxes and other art supplies all day. That's why I always end up buying tons of crap I hardly ever use. At least I do keep my small collection of vintage paintboxes out for display, so I can see the colors.