It would help if I knew what paints he used(Foundry,Games Workshop). :rolleyes: If he used GW paints my guess would be Black undercoat, Dwarf bronze,brown ink,Shining Gold,watered down brown ink,then 1/4 silver mixed with 3/4 Shining gold for a final highlight(Only on the very raised parts).Foundry would be close to the same Black undercoat,Brazen(36a),brown ink,Gold(36b),watered down brown ink,Shiny(36c)on the raised ares only.Hopefuly my guess helps you out.
Note:With the shadows in the picture it does effect the model,it looks a bit grainy.I suggest you try one model painting as normal and check the results.If that isn\'t working then try dry brushing in layers(small amounts at a time) to get the grainy effect as shown below.Use the steps I suggested above.I wish you luck.
Cheers
Axebreaker