This was something of a test piece, so I used some of my miscast blocks with air bubbles (I was in a rush when I cast this lot and forgot to tap the bubbles out before it set!).
This is some sort of processing tower. You can see a conveyor rising up the side.
Painting is with Inscribe acrylics, a mixture of ultramarine blue & raven black highlighted by adding a few drops of white. GW chainmail was used for the metallic areas. Rust is Inscribe burnt umber for the dark brown with edges highlighted in a brighter burnt sienna.
Technician and robot assistant from Ground Zero Games. Unfortunately, I think this old bit of equipment is beyond their ability to repair...