I made another metal coated model, I tried a mix of mainly bronze and a bit of brass for a golden/yellow glow.
I printed this Sandman model on my M200 with HIPS: http://www.thingiverse.com/thing:488952
I painted a few coats of the metal/glue mix and after drying I patinated it with some Liver of sulfur. Then some burnishing with 0000 steel wool and a few coats of matte clear varnish spray!
For more info go to Dizingof's website: http://www.3dizingof.com/3D-Printing/2015/01/metal-coating-3d-printed-plastic-designs-by-dizingof/