Oooh, tasty sample, BB.  The only idea I can offer is that if you were doing patina material, that should have little/no specular, and have a fine granular/powdery surface texture.

     I have an old armillary model which would look good with that effect.  I probably should update it, though, putting a fine bevel on edges to hold metallic highlights.  It was originally released for the FaerieWylde Christmas 2009. 

   Ah, it's in the freestuff here  armillary

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Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5