Left Side of boot all clean

Middle of boot has tiny bits of surface rust

Then the right side has some rust

Close up

and in the little hole by the arch

The outside of the same parts


And finally under the bumper

I was prepared to get the arches and sills fixed, but now I've found this i'm not sure if the chassis is buggered. The rust inside the boot does seem to be attached to the arch and could probably be done at the same time. But that patch of rust on the floor of the boot concerns me.
All the rust I found I treated with some kurust for the time being.
Is it time to sell up/break?
