**** UPDATE ***
...still finessing the paint job. Pistol grip now blacker and polished (as Bakerlite), powdered graphite rubbed on highlights and flat surfaces, then dry-brushed again! Also polished the grip with auto wax (hey, why cheat something if you can do it for real!)
Nice effect to get some more variation in the colours, the black of the grip against the gunmetal, subtlety is the key, need to get some more "grime" into the crevices too.......anyway, looks better in the flesh. Hard to photograph properly
For anyone wondering, the REAL key to realism is DEPTH. Get those (thin) layers on and mix up the shades, highlights, gloss levels and textures.
Will need to have the finish "fixed" using a fixing lacquer spray of some kind. Research required......
Again, plenty more pics here; http://www.flickr.com/photos/dallaspoll/
BTW, big ups to Casey at Doopydoos for the brilliant castings !!!!! (Plug, plug)