The walls are 1/64" birch plywood; the battens are .010 x .020 strip styrene. Because the grain of the plywood is on the large side for my scale, I painted the walls with acrylic craft paint rather than using the famous Thomas "Bug Juice." The weathering is done with watercolor pencil - wet or dry, depending on how dense I want the color to be. The doorknob and the exterior shelves won't be put on until later so I won't knock them off when I'm working. Here is the left exterior:
And here is the other side. The pieces on the plastic lid at the upper left of the picture are the legs and top of a shelf that will go next to the door on the inside.
Next: the roof.