In Tim's chapter on gold toning he actually gives some advice on how to get actual metallic gold tone using gold toner. It's on page 62 in the left column under "The midas touch -- metallic gold". It sounds like it's a bit unpredictable, very paper dependant, and the process requires bleaching, redevelopment in a lith developer, and then gold toning directly from the developer (before fixing). The process doesn't technically sound too hard, you just need the right paper and chemistry.
Tim hangs around here, he'd certainly have more advice.