Smoothing The Rough Spots
After you have popped the low spots out you may notice that the area now looks like it's bulging out too far. This is because every time a dent is created, it also creates a crown, or high spot, around the parameter of the dent. If the dent were shallow, we would simply use the dolly by placing it on the backside of the dent with a little pressure, while lightly tapping the crown down. This creates opposite pressures, but since the pressures are forcing the sheetmetal in and out, the shallow dent and crown have a chance to smooth out at the same time. View Related Article