I've been experimenting with multi-layered wallpaper on walls, using a small piece of 'wall' for trial. This is the first time I've done something like this, so it was really a big question mark how things would turn out!
Note that the pictures here show a rather extreme weathering pattern, which in this form cannot be used for the "Jane's attic" project. The reason I did it in this way, was simply to gain knowledge and experiment. This knowledge will then be applied when creating a much more subtle weathering on the attic walls.