Then I decided that the earth isn't flat, so why should my layout be? Here I take a corner piece and put up a little hill. Under the paper mache is a combination of ceiling tile and news paper. I was going to try to use the wire brush and ceiling tile technique, but I wasn't having any luck. Then I used the same method as Mt. Lookatthat and used a ripped up sheet to cover the 3 layers of paper mache, making a nice drum tight small mound. Yes, you DO see a newly formed lake. More on that later. Finally, I decided to go with plaster of paris on the final coat, just for something different and to try other methods.