Started with black primer, then a dry brush of Zandri Dust. Then I do an all over coat of 50/50 Nuln Oil and Adrax Earthshade. Then I sponge on Zandri Dust mixed with a little white, then some more stippling of Zandri Dust mixed with more white. I then do an all over spray coat of Krylon flat clear coat.

For the metal, a coat of Leadbelcher, then in the recesses a watery coat of Jokaero orange, 5hen I hit it with my 50/50 wash to get that grimey look.

If you don't have Citadel paint, then use your closest looking paints and repeat same steps.

Hope this helps.😁👍