I started my first restoration. First I tried handsanding the blade, but after a couple of hours I realized I wasn't making any progress at all. So I tried machine sanding with a 180 grit flapwheel wich I placed in a fixed drill.
I managed to remove 'most' of the stains, execpt for some black rust wich is embedded a little deeper.
I haven't hand-sanded it with 400,600 or higher yet, so this isn't the end result.