I finally managed to do some more work on the RDM factory building. It's still work in progress but I am really pleased with the result so far.
I have weathered the Vollmer N scale brick sheets, multiple layers of dry-brushing white to grey, rubbing black Vallejo pigments in the almost dry paint and spraying thin layers of Modelmates rusty red and oil brown.
"Glass" was added and almost all red Evergreen strips are placed. Still some more to go... ...
Then the final touch up where colour is missing and more weathering needs to be done.
I have googled for factory interiors and will experiment with print-outs behind the glass. The windows are quite large and it might - if it works - quite well to see some machinery etc.
The black background you see on the images is a placeholder only.