More details! I’ve added some framing added to the windows: trimming matchsticks down to roughly the right size, and then sanded the ends until they fit into place. These have been attached with PVA, which will probably be more resilient than the matches themselves..
A street shot for scale:
And beginning to add some nylon mesh to the inside of the windows (intended to look like the windows are made of many small glass panes). I’ll pick this out in silver when the building is painted, and will put some black paper or card on the inside.