Hi Andrew, thats a lovely solid looking van[^]
The only way to do it properly is to take it back to bare metal. Use a flapper disc and wire brush in your drill, or even better in an angle grinder, and take the paint and rust back to shiny metal. Treat it with Aquasteel and then a thin skim of filler when its dry to bring it back up to the paint level then prime and top coat.
re-doing the interior then ? it looked o.k ,just needs a re-vamp. at least you have not got too much to do(fingers crossed) will be nice to see it after a bit of love has been put its way-have you a name for her/him?
Farmer matt, the big cupboard blocked the back window to much, also it didn`t really serve a purpose. I am having new curtains made and am re-covering the cushons. The name of my camper is mjp1 after my late father.