Many thanks for the advice so far, seems very sensible and helpful.
So far the small Bosch angle grinder seems to be holding up OK as is the larger Ozito brand one.
I bought a cheap air chisel which seems to be working OK to open up once the panels are removed but a hand chisel is faster to cut the dags of weld remaining down to grinding size.
There are no spot welds in this body, just tacks about an inch long, and often the seam welds have penetrated beyond the outer skin. I'm finding the best way is to cut along the lines then chisel and grind once the skin has been removed. I've had some kind offers of help though so if the rain holds off there may be some serious progress tomorrow.
