The birch trees in the painting to the right were created by applying torn strips of masking tape to dry paper before pouring. Randomly flung Rubber Cement made the swirly lines. Once dry, the Rubber Cement is removed by rolling your finger along it.
Below, in “Unwritten History” I doodled with a white, wax candle on dry paper to make the arcs. That wax is still there. A friend once “mistakenly” dripped melted wax onto her paper before pouring. Those globs, which she could later remove, made very interesting shapes.