There's a thread on the board somewhere where someone applied a gold buffing powder on one of the bluefive idols, and it looked amazing.
Here's a link to the product:
http://www.hawkeyeshobbies.com/catalog/powders.htm
I haven't tried it myself yet, but the process is practically identical to the one I use with graphite powder to give painted resin guns a blued steel look. If you're not comfortable tackling the idol yourself, I'd be happy to apply the gold finish for you. PM if interested and we can discuss details.