I've been working on this as time permits, which isn't much!
I finished the boiler house. The trim above the windows was a trip to paint! I first tried it freehand with out a magnifying aid, but I just couldn't see the edges of the trim clear enough. So looked for a lighted magnifier that wouldn't cost an arm and a leg. I found this at Harbor Freight:
Wally was a bit jealous until I asked him "Hey, Wally, show the new guy the ropes, will ya?"
Then he perked up. I think they'll get along fine together.
Being finally able to see the trim well enough to paint it, I got that done. I used some .015 clear PVC from Midwest for the window glazing.
Tip: do not try to install the individual panes. Just cut a piece of your glazing large enough to cover all the windows in a wall at once, then glue it to outer edges of the outer frames It doesn't even have to be glued to each frame. Weight it down, and once it's dry no one will be able to tell that they aren't individual panes. Save your sanity!
Once the glazing was installed, I glued the walls together. Before I added the roof, I used some black construction paper ($2.49 for 50 sheets from Michael's craft store) to line the inside of the building. This will prevent being able to look in one side of the building and out the other at the same time. I used regular cellophane tape to tape it in place. The base and roof were then glued in place.
After the glue had dried, I placed it on the layout in the general vicinity of where it will go. After I get the main building done, I'll go back and add the ladder and railings for the cooling tower.