The back scene is now in place. Whether it is because we have had such a dismal Autumn or I've got rather fed up with Mediterranean skies I've gone for a rather grey day with possible showers on the way.
I used material that is used in those "pop-up" advert/information panels. The material was stretched across the garage and held with clips at either end, it is sturdy enough to support itself. The "painting" was done with white and grey primer and a Frost blue aerosol.
I let it dry for 24 hours unclipped it and rolled it up and took it to the railway room where it was clipped to the back scene.
The greys etc are a little stronger in real life. Inow feel that I am getting somewhere