I successfully installed the second floor of the dollhouse, though it was challenging. It's crucial to complete the floor before proceeding with installation. I followed the same method used for the first floor.
During the process, the front door window was damaged. To replace a dollhouse window, I contacted Greenleaf to send a replacement window sheet and am currently waiting for its arrival. The window replacement was complicated because the trim is integrated with the door. Removing the trim risked damaging the door's hinges, which would require a complete replacement. Using a box cutter and a tiny flat head screwdriver (similar to an eyeglass repair tool), I carefully chiseled and pried off the top trim. I then removed any remaining glue and broken window parts. Once I receive the new window, I'll cut out the needed section, glue it in place, and reattach the window trim. I'll use spackle to seamlessly join the top and bottom trim.
Dollhouse windows, particularly acetate ones, are extremely fragile and prone to scratching. If a scratch occurs, an unscented, colorless lip balm can repair it. Apply the balm directly on the scratch and gently buff with a soft eyeglass cleaning cloth. Avoid using towels or paper towels that might cause further damage. Continued application and gentle buffing will help the scratch disappear.
The decorative beams around the windows now create a cohesive look, making it appear as though they were part of the original design. I've also completed adding the two side back walls.