A basic form of metal-finishing is banging on the metal using hammers and dollies. By placing the dolly on the backside of the fender and hammering down on the dolly, high and low spots can be removed. If Newman hammers directly on the dolly, it will smash the metal and remove a high spot. On the other hand, if he hammers around the dolly, he can bring up a low spot. Once he has made a few passes, Newman pauses and feels the metal with his hand to see if the metal is straight.