You mention that the brake booster was reconditioned. The leak is from the master cylinder and from the looks of it, it wasn't reconditioned. (Correct me if I am wrong). Replace the master cylinder.
David.
With the repairs complete, we spent a week or so making the panels fit nicely adjusting the panel gaps to 5mm.
The body was then scuffed with 240g and given a fresh coat of 2k Epoxy.
After this it went off the to paint shop!