The windows were made on pieces of thin card (which are about 5mm bigger all round than the window opening on the building). I marked the actual size of the opening and onto this glued matchsticks which were cut to size to form the window frames. When the frames were set I coated the windows and frames in PVA and then painted the windows in a pale grey followed by a thin wash of light blue. Once they were dry, I inserted the widows from the inside of the building using the 5mm overlap to glue the windows in place. The frames were then painted in flat blrown and highlighted in a paler brown.
I still haven't put the fron windows in yet!.....sidetracked by figure painting!.... When I do get around to it I'll post some pics on the blog.