Ski, I have used 2" foam, painted white and then used the batting as Tracker John did. Sometimes I lightly sprinkled the flakes you buy at Walmart over the batting to give a bit of a shimmer. It sticks to the batting, so doesn't mess with engines. Here are a few variations over the years. I don't know what to do this year. I started these when our first daughter vacated her room when she got married. Now my wife has pretty much taken over both daughters' former rooms for sewing projects and storage.
