I make my walls out of foam core. A single sheet is not big enough, so we've been making the basic walls out of a full sheet and half sheet attached together.
Now, foam core will warp when it's painted. The first two sets of walls we made were fine. I thought it was because I painted the backs as well, so any warp from the first layer of paint on the front would be counteracted by a coat of paint on the back.
But we learned after making the castle walls that there was more to it than that. The first two sets of walls had been made by attaching the half sheet of foam core below the full sheet and then scoring the fold along both. See the example on the left....
Then it dawned on us that the warping had to do with the basic design. So when we made the walls for the Wood Cutter's cottage a year ago, we went back to the old method, and the walls turned out nice and straight. So I've wanted to make a new set of straight castle walls, but had been putting it off. It is a lot of work after all.
So Jan made the new foam core castle walls the same way all my straight walls were made, and added some foam core strips which I wanted to portray 'pillars'. After doing the underpainting it was clear that we were back on track. There was hardly any warping. Just a tiny bit, which a coat of diluted paint on the back totally solved. Then it was time to stamp on the stonework.
I squirted different earth tone colours of paint onto a plate and used cut out sponge rectangles for the different sizes of stone. I started by stamping the 'pillars' first. Then made my way up the wall....