The wooden parts are from 2mm Balsa.
Bases are 5mm foamcore.
Structure on the walls is a mixture of paint, fine sand and PVA glue with a bit of water.
Metal stuff: various thicknesses of Plasticard (plastruct) and rivets made from Plastruct round sticks.

Paintjob: everything spraycoated with a black mat acryl can, then a tan color. Highlights with first GW Bubonic Brown, then with white acrylic mixed in. Darker shades first with GW Snakebite Leather and then a GW Golden Yellow on top. I´ve seen that paintjob on that site from Australia with the CNC-cut buildings and really liked it - although it seemed at first very unusual to emphasize the corners of the buildings with darker paint instead of lighter paint (hard to describe).