There's a few in the Sunn '99 sticker sets. The domed crossbar "comp" stickers, for starters - metallic gold with doming. Then there's the downtube base protector and seat tube model logo, both of which have metallic, plus some rather subtle highlights done with matt, satin and high gloss black.
Given that vinyl stickers originally have a layer of contact adhesive, and contact adhesive in itself isn't exactly rocket surgery. Need to find one that won't eat the stickers, though. 3M have a pretty huge range