I used some silk screening material to make screens for some of the windows of this caboose. A marker was used to colour the material, which is normally white.

I bought some very cheap, but broken wall sections (Magnuson, I believe) off the "used" table at the LHS. I repaired what damage I could, then used .060" sheet styrene to build the roof and unseen walls. Since some of the window sashes and mullions were broken, I used strip styrene to model these in the open position, although not with screens.
Wayne