How to Roll a Clay Slab 

Won't speak for them, but I'd say no. It's basically your work area, so you should only have to clean it when your done using it or next time you use it so little bits of dry clay won't get in what your working if it deigns your attention.

I found those at my local home improvement store (Lowes) and I'm sure you could find similar anywhere you can buy lumber or millwork.