06. Next, finish the small dings out with a hammer and dolly of your choice. It really doesn’t matter what you pick. A guy with experience in metal work can use anything to knock with. It’s more or less a feeling rather that having tools with fancy names. When you are hitting, you can feel and push your dolly (on the backside of the metal) around with your hammer. In this fashion, you can correct creases, dents, etc. with any shape dolly. Here a 3-pound sledgehammer and metal wheel were used, pretty high-tech, huh? The metal will look marred when you are done but this will come out with an abrasive disc, sand paper, or high-build primer. Notice that the dings at the rear of the tank are gone.