Jinty, I wouldn't worry about the rad, just use the correct antifreeze.
The wired wings are possible to sort. Your best bet is to contact a bodyshop/restorer with experience of wired wing edges. Corrosion inhibitor treatment might work with a repaint.. I am sure others here will have experienced and sorted the wing edge problems.
I think the newer Superform wings are not wired but have stick on raised edging simulating the wired seam?
The redox table shows the relevant electrochem values of Fe and Al.
Steel wire was used to wire the wings so not really a good mix!
