Glaze is only for shine, right? I've only panned a few chocolate items and left them un-shiny, dusted with cocoa powder, powdered sugar, or even a little decor powder aka luster dust. So maybe something that adds flavor or color instead of shine?
Do you always use vegan sugar for these friends? If the bone char doesn't bother them maybe they'll also be able to overlook a tiny little bit of bug secretion and enjoy those tasty treats you worked so hard on. (which is up to them to decide after full disclosure, of course)
