So I went at the rear corners during my lunchtime today. Looks like the corners had rusted and someone has used a fair amount of filler to cover it up.
I should be able to source some decent replacement panels, but is it pretty straight forward to cut out and weld in?
It looks like the rear right corner has a weld line right through the middle of that chipguard. The lower corners are ‘cosmetic’ just take it on one panel at a time, so fix what you’ve found rear left first otherwise it will become very overwhelming very quickly.
As for structural it depends on the inner panel, if that’s goosed too the whole thing is reliant on the boot door frame and rear quarter. Inside the air vent bit that you can see through the rear light cluster opening, that attaches to the chassis. Someone else on here has just found that job and it had corroded the chassis rails quite a lot too.