old gold is fun...i've done a couple of things w/ it...
just for something simple, it looks good w/ mulch in the crease i think. but it looks really cool over somehting black - i like to put blacktrack fluidline on my lid, and then old gold on top of that. it makes a really cool green color when used like that.
i think i've also worn it on the lid (just over bare canvas paint), with humid in the crease, and then violet pigment as a lower liner, w/ blacktrack as an upper liner and for the waterline. sounds like a lot of color but it all works.
it also looks great w/ parrot (or another deep turquoise) in the crease. old gold is so cool b/c the iridescence in it changes so much, depending on what you pair it with.
hope that helped!