The nail guns are usually called stud welders. With any HHS structural repair you are required to resistance spot weld and only section in I Car or factory recommend locations, most of the time it is a complete panel replacement as sectioning is a not approved, but that holds true in North America only apparently. Our local insurance company is selling through Impact aka Adessa and seems most of the newer vehicles are going to foreign countries and at astronomical prices, prices at times are at what the vehicle would be worth after the repair. Possible money laundering? No hard working tradesperson is going to pay those kind of prices, at least I'm not.7