Tom, here is the beginnings of the large 5 story structure I’m working up. I first created a mock up in pink foam just to get a rough idea of the layout and foot print making changes as I went. It helped me get a better idea of such a complex structure with multiple different levels and bump outs that has several different roof styles. What you see here is the next step which is building a new mock up that is going to be very close to scale so I can fine tune the design and get it closer to a final version. This piece is the core of the structure, it will be added on to on every side and the top as well. Inside is a ledge all the way around that acts as reinforcement and also a place to set room boxes on if I choose to add some interior scenes in certain windows. This mock up is made of 0.040 styrene. I will share more pics after more additions are made

I made a mold of silicone rubber of nut bolt washers so I could cast my own as an experiment to see if it would work. The mold is so small that it requires probably less than a teaspoon of resin to fill it. That’s to small amount to mix easily. It would be better suited as a place to pour excess resin from a bigger project, to use up any leftover resin that can be scraped from the sides. Since I didn’t want to mix such a small amount, I decided to try and fill the mold with craft paint. It did work but I had to fill it multiple times because as the water evaporated from the paint, it shrank and left a void in the mold. I probably topped off the paint in the mold 6 times before it stayed full of cured paint. Did it work? Yes, do I recommend it? No. Resin would be the better choice, but in a pinch, it could be done. 👌