Acrylic on corrugated metal. This is an example of one of the murals I've been working on. The dinosaur is not my artwork, I only copied it with the artists permission.
This surface was the most difficult to paint on. Every six inches there is a one inch piece of metal that juts out. Very hard to paint a scientifically correct dinosaur. I created the background scene from the middle of the wall and up to the top of the wall with text labeling the building.