In the grand tradition of Facebook, I 'like' this thread....
Although the couple of rust spots on my Puma are still cosmetic (just) rather than structural I had meant to sort them last summer - alas, that was not to be....
I am intending on doing a quick, sand down, apply rusteater (of some sort), prime, & repaint to tide it over and will aim to get the rot properly cut out and panels replaced/fabricated in due course.