Here's an update. Some pics after about 3 hours of airbrushing.
I used all Vallejo paints, laying down heavy greens and browns first, then going back over everything with rust spots and dark shadows. A final airbrushed coat of Devlan Mud helped add to the grime.
I hand painted the sea mines (before I got my airbrush) and laid them in the water base. I still have many airbrushing layers of oil and clear resin I want to add to bring out the water effect
The next step will involve painting all the details on the inside of the cabin and all the Brass Chaos Trim complete with a heavy green rust Patina.