When rolling out Creative Paperclay® it is important to keep the thickness of the clay consistent. To do this I use foam-core board. I put two or three pieces together for the thickness I desire.
For instance on this hat it was important that all the pieces were a consistent thickness so the drying time wouldn't vary on different parts of the hat.
I roll out my Creative Paperclay® between the guides on transparencies on glass. The glass gives me a smooth hard surface to work on. The transparencies allow me to move one piece off the glass to dry and start another.
Use a rolling pin dedicated to Creative Paperclay®