If you are looking for pictures to use as inspiration then the Horus Heresy black books are excellent for this sort of thing! Not saying you should buy them - I'm sure you can find pictures online... Horus Heresy Book Two (Massacre) and Horus Heresy Book Six (Retribution) I think both have a good amount of Iron Hands images in them, with plenty of vehicles. In my opinon what separates Iron Hands from Raven Guard is that Iron Hands have a slightly metallic finish to their black armour; I've seen people get really nice results by lightly drybrushing a dark metal colour over a black base coat, to make it seem just a little bit like blackened metal, without it looking silver.
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