So, as I was assembling yet another Exorcist tank, I had the amusing idea to paint the organ part of the tank as though it were made of iron, so I could refer to that particular tank as my 'Iron Maiden'. However, I realized that I am really unsure how to create such an effect.
My first instinct would be a mix of boltgun metal and chaos black, and then lightly highlight it from there. Alternatively, boltgun metal, with a heavy inking of badab black...
Either way, I am not sure how it would turn. So, I come here, in hopes that someone has attempted such a colour before, and may have any advice to offer.