us panel beater guys have tools called pin pullers that weld a stud or pin to the metal then a slide hammer is used to pull it out then the stud is snapped off after
but!!! we dont like welding fuel tanks because even if it hasnt had fuel in it for years they can still go bang they can be either washed out with soapy water steam over and over again aor just filled with water to stop the bang but then the inside of the tank will need treating after to stop rusting