This is a lot of reading but very interesting, thanks
I used to work in the aircraft industry where hammer work was always done to repair damaged aircraft, no bondo allowed.
I watched them do a wing panel once and they attached something like a battery charger or transformer to the metal for a while first, any benefit to this or is this method also used in metal working ?
I don't know what the purpose of this was, but they wouldn't touch it until a set period of time had passed with this device attached.
