Here is my first Ghar. I want these models to look 'industrial' - the 'fluff' describes them as living only for war, and not doing 'aesthetics' at all - so I went for bare steel, with 'tungsten' tips to the limbs, brass piping and copper rivets.
Painting was pretty much how I always do it, but I find that Testors' Dull Cote is too matt for metallic subjects, so this has Vallejo Matt varnish instead, which has a slight sheen and allows the metal colours to still look metallic.