This is a difficult call, as everyone here would do something different to that suggested by anyone else!
However, As a static model you do have more options as the finish needs to be not cosmetic.
Removing the patches (lead…or tin?.) MAY reveal damage requiring a lot of work.
Yo could almost simply make good the big damage, seal the hull with something, EzeKote for instance, and repaint it. This would retain a bit of the afore mentioned charm, and also be “reversible”, in that later on if you decided to do something better, the only changes you will have made to the fabric of the hull is to add paint,
Ashley