Left rear door

I guess it should have been expected, but I didn't manage to weld the skin back together without it buckling more than I consider acceptable.  Two options: try to hammer it out, at the risk that I don't do it well enough and cause more stretching than shrinking; or to cut the repair piece (which is in far worse shape than the original part of the skin) and some of the original out and make my own.  The second option is the better one...