It is a pretty simple build, requiring only a few casts. I used the Hirst Arts Wooden Plank Mold (#220) to make the second story floor, gluing the pieces onto a scrap of Taskboard. A piece of wood served as the base.
I used Envirotex Lite Pour On High Gloss Finish resin, thinking "this will never work." I was shocked then, when the plaster absorbed all the resin, and after a few days to cure the plaster was surprisingly hard and I wasn't able to scrape any with a finger nail.
So, after the same kind of paint job I used on the previous piece, and this simple (but surprisingly durable) bit of corner terrain is finished.
I may have been made a believer in the resin-infusion method. More to come, but comments always welcome!