I don't know how she does it, but to make my charms shiny, I either use that clear coat nail polish or I use gloss spray I got from Micheal's. I reccomend the spray, though it'll smudge marker, so use paint.
Omg I want one so badly!! Once I can justify spending $30 on an adorable critter (instead of boring stuff like groceries XD), I'm commissioning one! I should be getting a raise at my job in a couple months...Maybe this will be my present to myself!