I am looking to use 2 different clay bodies in my work. I am not marbalizing. I would like to create a slab base with the brown clay and attach details and forms made out of the white clay using a slip that would be made from a mixture of the 2 clay bodies. I am also hoping to wedge the 2 clay bodies together and sculpt forms as well. Obviously I would test these things out but I was wondering if someone more educated on clay bodies could tell me if both clay bodies have a shrinkage rate of 13% at cone 6, do you think this sounds like it might work? What troubles might I encounter if I do decide to try this?