During my holiday my mate Ferry cleaned some pieces the cab a bit with a machine bristle brush (if thats the right name for it) and applied the Rustöl to preserve the rust and keep it from rusting further. (first 2 pics) I like the finish it's giving, bit still debating whether to clear coat it, which we'll test on the glove box first. We made a transport wagon for it, so we can move it around easier and it fits on the lift.
now we need to suit up, get some good mask and clean it all down.