I know the quoins (corner stones) are not quite right, but there is no way I could paint half-stones neatly enough. I decided to paint the roof to begin with; I may cover it with tiles later. I used a red hobby paint that turned out awful, so I diluted with with water with some brown paint added to it, which produced tolerable results. At least the house looks somewhat finished now on the outside.
Then I turned to the front doors. I had painted one of the windows earlier, just to see what it would look like, and it doesn't look good at all.
But first I had to decide whether I would use paint or wallpaper. I know my limitations, so I realised that I would never be able to cut neat wallpaper around the windows; therefore I decided to paint. I used Brian Long's excellent book The Authentic Georgian Dolls' House for colour guidance.This is what I ended up with:
My next concern was what to do with borders and how to separate the two floors. For the latter, I used a dado rail, and I painted the upper border white and added a cornice. As usual, I take the step-by-step pictures because only then you see how each step makes a difference. You don't see it with simply the before and after picture, at least, not in a larger project like this.
For the opposite door, I chose a different colour scheme, and again, the rail and cornice make a neat finish.
I still need to decide what to do with the side borders.