The brickwork was painted all over with brick-red paint, daubed on using a small piece of sponge touched into the paint. Once dried I used a cotton bud to highlight several bricks in various shades of brown.
The inside detail was to be minimal, so I created a dado line around the box and painted it a shade of green.
The switch levers (rivets) were painted black, blue and red.
Next stage, to finish off, will be the addition of the external steps, roof and glazing panels.