How fun! I am a big fan of HS Gold Lame I say, just spray it on everything! It's a fun way to add a little bit of shine to a whole background or just some embellishments. Try masking off an area (you can even just cut shapes out of plain/scrap paper, you don't need a fancy mask or stencil) and spraying over top.
Use the dropper out of the bottle to add drops for a big gold splash!
Just be sure to shake it up well, the gold separates out of the carrier/base quickly.