Re-working into a handmade paper painting is tricky. The water used in the pulp that is applied to the surface of the in-progress painting warps it, and it can take a fair amount of labor to re-stretch the painting so that it lies flat again. To off-set the negative affects of adding water to the surface and prevent the warping, I dry the base sheet (the sheet of paper that I will ultimately work on), onto a stretched screen (shown above). The hairs of the fiber cling to the surface of the screen and grip to it, thus preventing the the paper from warping. When the painting is complete, I simply remove it from the screen with my finger tips.