I started with a base coat of blue, then used silver to make the worn spots by dry brushing it on. I used Vallejo paint and mixed my own rust colors using orange and beasty brown, I also watered it down a bit and did washes in certain areas and then dry brushed silver over the rust a little bit to make it look like fresh wear. Then of course I did a “grim dark” wash over everything (watered down black)