A long time ago I was experimenting a lot with getting just the right combination for painting patina/verdigris on my models, namely Grave Guard and Black Knights - and that was before Nihilakh Oxide was a thing. Eventually, I got the thing right, wrote down the recipe and used it successfully on Krell. Then, when I was working on Nagash and the Wight King I managed to make photos and prepare a whole tutorial describing the whole thing. Since then I used it also on the converted Necrosphinx…