I use this, but it needs several coats. edible and ready to go. it comes in liquid form. ebay has them too.
http://www.globalsugarart.com/gold-glaze-ready-to-use-20-grams-by-bakery-crafts-p-25405.html
https://www.facebook.com/pages/Our-Little-Cakery/210300489070445?ref=hl
