I'd already started this colour scheme before Games Workshop decided to copy it and use copper Necrons for their 40K revamp :P. This was a second-hand "Finecast" resin model from when GW decided to raise the prices and reduce the quality by using resin, and true to the Failcast reputation, the casting quality was horrible and took 2 hours to clean up as well as having missing pieces and irrepairable lumpy bits.
The blade and bone took ages to get smooth enough blends, but the copper was mercifully easy using a good basecoat colour and translucent bright coppers. Recipe as follows:
1. Basecoat Screaming Bell
A very rich orangey copper, pretty much covers in one coat.
2. Black line all joins
Optional but useful for a model with many joins, tidy up with SB afterwards.
3. Wash Nuln Oil
Current Nuln Oil is weaker than the previous one so this doesn't dull it down too much.
4. Recoat Screaming Bell
Over most of the armour, leaving the recesses shaded.
5. Layered highlight Hashut Copper
On the raised areas - a brightish translucent copper that doesn't need blending.
6. Layered highlight Sycorax Bronze
Ditto, but closer to the edges.
7. Blended glaze of Rhinox Hide into recesses
This brings back some colour and matt contrast into the reccess, much easier than trying to blend the metallics.
8. Edge highlight Mithril Silver
To get that nice crisp shiny edge.
9. Wash Agrax Earthshade
To bring back some colour and tone down the brightness a bit.