Thanks for that tip Lurch...I guess the thing to avoid is overheating the metal so it doesn't distort the skin, I'll be very careful and sparing with the heat...I think annealing is a good idea, even standard practice too I think among professionals
Actually my old skins or at least one of them has had the treatment that MaygZ just talked about, replaced bottom 3 inches...but probably done without removing skin first, rego job most likely, heaps of bog to finish off
So to answer MaygZ's question, remove skin first for the best job....if you learn how to fuse weld with an oxy you'll save yourself a lot of heartache...and of course panel beating but yes it is very possible and feasible to replace that narrow bottom section, it's a dying art though, thankfully there's that show on TVS channel, forget what it's called now but lots of good tips on panel work
No worries there Lurch, you read my mind, gunna change my ID soon, already have one in mind, wait for it !........