Its quite clear that this is a devisive subject, I thought one way to do it might have been to remove the entire panel by basicaly unpicking the welds down the sides at the major seams, the seam at the top of the roof cap and the one down the side where the rust tends to begin, and hand fab a panel to suit. A lot of time and money I know but in my thinking was these joins would then be where the factory seams were, a big job yes, but would it give the desired finish?