Today I placed the dollhouse structure on the first floor. I also wallpapered all of the interior walls and applied the paper flooring to the second floor. Just as I did the flooring, I also primed the walls before applying wallpaper to them. I used a flat, white paint as a primer.
I cut thin strips of cardstock to create the baseboards and trim around door openings. The inside edges of the door openings, can be painted white to match the trim.