I managed to do some significant work on the Modellbau Najewitz buildings today. I tried doing some staining over a primer layer, which didn't give the look I wanted so I ended up painting them with a flat indoor latex, then picking out the screens, posts, and doors with brown. This was followed with a stain of MinWax Golden Oak. It doesn't quite match the Harem building but then again total uniformity in the coloration isn't a great idea anyway.
I'm also doing some experiments on a good way to make mud brick walls for my Darkest Africa project. Here is a pic of some Gatorfoam that has a layer of bricks screened onto it, using a Litko brick template. I'll be posting more images of this little endeavor later once I get it figured out.
Thanks for looking!