We sell a poly ding repair kit that includes everything you need to take care of any dings you get over time.1. Pull out any broken fiberglass in the ding2. Scratch up the area about 1" around the ding with sandpaper3. Mix resin and Q-cell to a peanut butter consistency and fill the hole. For a shallow ding like that you don't need to catalyze the q-cell mix. The UV rays will get in there..4. Sand the Q-cell / resin flush with the board5. Put a small patch of fiberglass over the area about 1" bigger than the ding on all sides and laminate with resin and a squeegee 6. When cured lightly sand the edges of the fiberglass down so there is no hard edges. 7. Brush or squeegee more resin over the ding repair to seal it. You can leave it shiny or sand it if you want.