Today, I worked on the passenger side rear quarter. I had a lot of holes to weld shut, from a previous slide hammer experience (likely in the 70's) They actually did a decent job of getting the panel pulled out, so I basically just had to close the holes up. I'm not to handy with the welder on sheet metal, or it's just too hard to get it adjusted correctly (old Millermatic 200)
Had a guy tell me to just replace the whole quarter panel, but I just didn't feel it needed to be done. The fit of aftermarket panels sucks so bad, I just didn't want to deal with the headache, plus it would have been way more work that just closing up a few (50) holes. Only took a couple of hours, instead off weeks, for a quarter replacement. Plus the door gaps are perfect, and it's only original once.
Using a brass rod or copper plate behind the holes, helped immensely with keeping me from blowing the sheet metal away like tissue paper.
In some areas, I couldn't get anything behind the hole and it shows (yes Angry Johnny made his presence known 
Finally cover up the mess
Geez, it got dark 
