Needing some advice here...
The digging continues. After prying some more lumps of Bondo out of the right rear wheel well, I got curious about the actual condition of the quarters. Especially after I noticed about 1/16" of Bondo inside the wheel lip... not a good sign. Out came the grinder with a 40 grit flap wheel on it (how did I ever survive without that before?) Turns out BOTH rear quarters were worked on by the same bozo who did the front fenders. Steel patches plug-welded over the top of the existing metal. I'm going to guess the rust is still under the patch. Effing genius. Then the whole mess was ground down a little and covered in Bondo, then sanded smooth. The panel behind the wheel has a good 3/16 of filler over a wide area. On the bright side, the car will go faster with 10# of plastic removed, right?
SO... it's gonna need a passenger side trunk floor, the lower parts of the inner AND outer wheel houses on both sides, and the lower few inches of the quarter panel just in front and behind the wheel arches, and I'm not sure what else at this point. OK, still not a show stopper. But I don't weld.
I can post pics but you've probably all seen this kind of crap dozens of times. Here's my question: Better to just patch the small that are rusted, or cut the quarter panel skin off and replace the whole thing? It would seem cleaner to replace both quarter panel skins, both outer wheel houses, right trunk floor, and maybe just patch the inner wheel houses. They're both just perforated on the lower tip, right behind the quarter windows.
I've never gotten this far into cutting and replacing sheet metal before. I'm not sure how I'd get everything clamped to line up perfectly so I'm not left with something out of Lil' Abner when it's all back together. What say ye, O assembled experts? And if I do all the disassembly and hire the welding work out to someone who knows what they're doing, an I looking at hundreds? Thousands? A case of beer?