It is nice to see some interest and feedback.
I had some time and interest this week to try sort out one of the problem areas of the roof. It had been pretty badly dented and filled with body filler.
The area is unfortunately covered from underneath by the inner roof structure, so I wanted to try sort it out without cutting into it or necessarily replacing the metal.
This was the result after a bit of time. It is still a bit wavy and had to use the only dent puller I had at my disposal which is not ideal. I also don't have a shrinking disc but have tried making my own temporarily which seems to work only to an extent. Will try to sort it out some more later.