Surftech Ding Dough Repair Putty Stick Ding Dough is a quick and easy to use fiberglass reinforced "dough-like" compound that is designed to cure in or out of the water. It's perfect for travel or at home repairs and it works great on both epoxy and polyester surfboards. Just three quick and easy steps: pinch it, knead it, smooth it and you're back in the water.