I was wanting to know if it is worth it to spot weld the seams on my 240z if so is it worth it to do the whole car or just certain portions of the car? I want to use it for track racing and every day driving , also I was about to spray the car with rubber undercoating and I want to spot weld before if it’s better to do so. I know there are some pros on this forum they can give me the best advice