Vec B minor rust to sort

All things considered, it's pretty solid but I need these 3 bits sorted..

1 arch


And 2 patches on the tailgate



What I wanted to do was treat it this year with Fertan then, next Spring, do the repair/repaint..

Never done bodywork before, anyone fancy chiming in with some advice?
This is good.. thanks Carl.. better get myself a wire brush and some fertan/primer/sealant.

Got a small amount of welding to get done on a chassis rail next year too, bit of luck will be able to get someone to waxoil it all then too...