I have had a Mark IV Forge World Grey Knights Dreadnought on my workbench for a while. After getting some weapon arms for the model. I gave the main model a black undercoat and started base coating with a metallic paint. The weapons I had given a white undercoat. Getting it out from storage, I decided to almost start again and gave the model a base spray of Leadbelcher. I gave the model a wash of Nuln Oil Shade. For the next stage I used some Citadel Leadbelcher. I took a large brush and gave the model, what I would call, a heavy drybrush. I then did a lighter drybrush of various silver paints.
I did intend to paint the base for the model next, but upon checking the workbench feature for my Grey Knights, I realised that I needed a paint I didn’t have. For my Grey Knights I painted the flocked (well sanded) bases with Bestial Brown and then drybrushed with Bleached Bone. I bought a pot of Mournfang Brown. I used this to paint the base of the Dreadnought.
I didn’t have any Bleached Bone either. I drybrushed the base with Citadel Ushabti Bone, which is a replacement for Bleached Bone.
See the workbench feature on the Grey Knights Dreadnought.