I use mostly Games Workshop paints and washes currently. The process should work with similar products from other manufacturers, although I have not tried it.
|Step one: Apply a nice gold base such as Gehenna's Gold by GW.|
|Step two: Apply an orange wash such as Seraphim Sepia by GW.|
|Step three: Apply a dark brown wash such as Agrax Earthshade by GW.|
|Step four: Drybrush using the original gold base color.|