as far as I understand it , so long as it passes the tap-with-a-little-hammer test then it's a pass
how you achieve that 'structural integrity' is then up for debate depending on your level of honesty / how temporary it is / whether you're dedicated to a proper repair in the reasonably near future
also underseal is often used to hide a multitude of sins which is obviously extremely poor practice to say the least but sometimes needs must I suppose
Answer #6 seems like the only right one from my perspective, in terms of access it's not exactly problematic there's far worse places to try and weld
Edited by stuart bowes, 19 April 2023 - 10:12 AM.