Here’s a rustic outhouse which I recently finished:
All the “wooden” parts of the outhouse are actually styrene. I used a razor saw to add wood grain, then sprayed it with a coat of gray primer. Over this, I brushed on thin washes of Apple Barrel acyrlic paints, starting with “Country Tan” and then progressing to darker shades of brown. The corrugated metal is aluminum from soda cans. The rolls of toilet paper are made from styrene tubing. The paper hanging off the roll is a strip of thin paper from a cash register receipt, coated with Apple Barrel flat white paint. The door handles are made from brass.
Here’s how it looks on the layout, where it is part of the Cliffside Mine complex:
Unfortunately, it had to be positioned at an angle that obscures most of the interior. There will be others elsewhere on the layout, so I’ll have another opportunity for a better display.