Hey, yeah! A rusty vehicle is the owner's failure to maintain, and a poor weld is the manufacturer's fault, and the onus is on the owner to pursue compensation, and they will choose the easiest closest person to blame, which is this mechanic. To be fair, an argument could be made that the threads ought to have been cleaned and some penetrating rust remover ought to have been applied, or the mechanic ought to have known and reported that extra time is likely considering corrosion. The only thing for certain is the annoyance of any option.
Uggad its last dugga.