Can you roll Pal Tiya Premium onto slabs using a wooden rolling pin - like you do with ceramic clay when modelling/carving large flat tiles?
Pal Tiya Premium can be rolled into both snakes and flat shapes. The trick is to do so on a *slightly* damp cloth. The cloth cannot be so wet as to allow water into your Premium and becoming mud/sticking, but still prevent drying out and cracking. Natural fibers such as burlap, terry cloth and cotton towels work best.
Flat shapes can be also achieved by sandwiching the PTP between two sheets and using a roller over the top.