"Dingmen" have been around since the invention of the automobile. Before the automobile, metal imperfections were being repaired using straight-line reflection. The first paintless dent repair (PDR) technicians were used on major auto manufacturers' assembly lines. They were the last to inspect body panels and used basic tools to press out damage and tap down any bumped-out high areas that occurred during assembly. Flash forward to the 1980s.
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