In another life when I was a body man there was no such thing as a butt weld when replacing part of a panel. It was all lap welding (actually brazing since that put less heat into the panel). We'd just drive the seam down a bit and plastic over it to smooth it out. Things have changed for the better over the years.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.