I just put in the paking lot behind the round house. I used white foam board. I bent it here and there for to make cracks and since it is used stuff from work the surface is pealed in many places, makes nise pot holes. I sprayed it Dark gray, but it looked like a epoxy painted basment floor! Then I tried flat black that was too black. Then I put the plaster around the lot. Well of course I got plaster all over. As it turns out I used a wet paper towel to remove the plaster. It left a gray film and after repeated plaster applications and clean ups it doesent look to bad. God I love this hobby! The more you messup the better things look.