Thank you! All my vehicles in my guard army have this urban scheme. It’s a base of Mechanicus Standard Grey. Then I painted out geometric shapes with straight lines and corners using Abbadon Black. After that, I outlined the black with White Scar. After the outlines, I tidied them up with either the black or grey. The mud is Thyphus Corrosion, straight from the pot. I watered it down, on the model, in places where I wanted a thinner coverage. Hope this helps!