I have to do a patch panel huh?

How do you guys think the moisture got in there? Could it be from the body plug behind the quarter? I never had a problem with it for years with my old paint job and as soon as I got it painted this all started. I'm kind of confused on how it could happen again after they fixed it. It doesn't snow here, I'm not near the ocean, there's almost no humidity and there's never been leaves or any debris caught up back there.

Anyway it looks like I'm going to have to do a patch panel, something that scares the **** out of me. I have a welder and gas but I really need to practice because I've never welded anything this thin. How do I go about doing this? The inner quarter panel looks ok to me. Do I just cut the outer quarter off, clean the inner quarter and then weld a patch on? Do the patches come with both inner and outer metal? Also should I patch all the way to the rear or cut a line vertical in the middle and just weld half the lower quarter on?


could have been moisture left on the metal before paint. Could be anything. I can attest that the AMD patch works and fits well I used the 70+ Dart style. There are a few spot welds you can grind out should be 3-4 on the bottom and a few behind the bumper. Drill those or grind them out first. Then you can cut the bad area. Cut an over sized piece from your patch and lay it up there. From there a few ways to do hang it. As far as welding you make small stitches almost like tacks at different points till its all welded. grind down skim over with some Duraglass short strand or similar then your plastic filler prime and paint.