Earlier in this thread, I mentioned and showed photos that I had used Celluclay for my terrain. I had applied it to a styroprene base.
My first attempt with the Celluclay looked beautiful and dried fine, but it seemed to shrink when drying and I noticed that it had popped up on all four of the corners of my diorama. I had put a lot of work into it and was really upset when it happened.
I called Mike (Mestell) and he gave me directions on how to mix and spread the second batch attempt.
Mike had taken a class on terrains and the preferred base to use with Celluclay was styrofoam, not styroprene. Styrofoam is an open porous material that would allow the Celluclay to seep into its pours and adhere better.
I peeled all my styroprene/Celluclay terrain up (cut it into small sections for small dioramas) and did it again, this time with styrofoam/Celluclay.
It took about two days to dry and looked beautiful. I was getting ready to paint it that evening.
I was talking to Joe (The Lt.) that day on the phone in my office, while the sun was shining on my dried styrofaom/Celluclay terrain, when I heard a pop. I noticed the Celluclay had again shrunk and popped up on one of the corners. I flipped out, threw a tantrum and started cussing, while Joe tried to calm me down on the phone.
For the second time, my Celluclay terrain had shrunk and literally peeled off like a layer of skin. After I peeled it off by hand, I had a perfect 3x5 foot thin Celluclay terrain laying on my floor.
After I peeled it off the Celluclay from the styrofaom base and still disgusted again called Mike. Together we could come up with no explanation why it didn't work for me. Mike uses this all the time and has had great success with it. He suggested the climate (humidity), I had no answers.
Anyway, I went to the golf course, got some really nice sand from one of the bunkers (sand trap on hole #1, which knows me and my golf balls pretty well

) and took a bag of sand.
I mixed it with paint and applied it directly to the styrofoam. It turned out pretty nice, but I also had to re-do my river (a pain in the rear), which turned out really nice.
Okay, the tantrum is over and I'm okay now. Everything on the table is solid and holding very tight.
Michael
I'm finished now, here are some photos: