Horrifying to think what goes on under there, yours looks as if it was attacked by a shoal of piranhas
How many days' welding is that roughly?
Exactly. What originally looked like a bit of surface rust from inside the boot turned out to be 'nothing but rust'...
For the inner sills, boot floor and wheel tubs, it totalled around eight day's worth I believe. Even adding in the outer sills, wheel arches, engine bay and inner wings, I think you're still in front for total days