First, here is a photo of how it used to look in all its post war Austrian finery.

So, I've got all my materials together.

Paint stripper, Dunkelgrau, Red Oxide, Cellulose thinners (for the Dunkel), White spirit (for the Red Oxide), Nitro Cellulose (for degreasing), goggles, masks and wire brush.
I also got some Jenolite rust killing gel but as is the way with everything these days it's rubbish so I found out that the active ingredient is Phosphoric Acid and what do you know but you can get an 80odd% pure bottle of this stuff from Hydroponics retailers. Brilliant... and cheap.

Tom.