I've spent a couple more hours tonight getting the last bits of underseal off. 2 points really:
1st - I'm glad it had it applied as it seemed to do the job, I wonder if there are totally rust free original cars out there, this one looked 100% till the bitumen sound proofing and underseal came off.
2nd - I wish I had only done this in the winter as with it beign a little bit colder today it was coming off much easier than when its warm(when the other was done).
I've got some pics to show the extent of the horror, I've marked it up in white tape...
Worse bits are the doglegs, well they wouldn't have been if they hadn't had an 'American' repair. which means smack it in with a ball hammer and then smooth over with 23mm of bondo.
This one i've cut off already...
This is the one that would have repaired nicely if they didn't have acess to a hammer and bondo.
So now its all naked the extent of bodywork is
Marked holes in the floor
2x dog leg
2x lower rear inner wing
2x replacement floor rails(misguided jacking/supporting of the car, they're solid just knackered).