Which method should be avoided according to Technician B when dealing with a dent?

Using a dolly to support the panel while working on a dent is a commonly accepted technique in auto body repair. This method provides stability and allows for better control when shaping the metal back into its original form. Supporting the panel with a dolly helps distribute the force applied to the area around the dent, minimizing the risk of further deformation or damage to adjacent areas.

In contrast, drilling holes into the panel can weaken the structural integrity of the vehicle and create additional repair issues. It also necessitates further refinishing work to cover the holes created, making it a less desirable method. Working from the back of the dent first and using a hammer on the edge of the dent are also appropriate techniques in dent repair when done properly.