This repair is know as the "body slam".
A metal plug is set in the neck receiver. The plug is connected to a steel plate. The plate is slammed (tapped really) onto a firm surface; maybe a technicians bench. The body often pops right back into shape. On older and softer horns the bends are often more complex and more difficult to remove.
A metal plug is set in the neck receiver. The plug is connected to a steel plate. The plate is slammed (tapped really) onto a firm surface; maybe a technicians bench. The body often pops right back into shape. On older and softer horns the bends are often more complex and more difficult to remove.