I probably spend 3 to 4 hours applying water to the panels before I bend them. A wet towel down first, then lay the smooth side on it. then keep pouring the water on the grooved side. I still had it pop in a few places. Ground those spots down then glassed it for some rigidity. I fill the grooves with bondo on the inside to lock the radius in and then glass the inside too. With the grooves filled and glass on both sides it's a pretty stiff seat.