Does anyone here know how the Auto Union's and Silver Arrows bodies were fabricated using 'body bucks'? I have been looking for information (especially pictures!!) on this and have found information (not terribly much though) of these 'body bucks' being used by Porsche, Ferrari, Jaguar and the like, but I would love to see something about Auto Union.

Thanks in advance

they were done in the standard English wheel/wooden 'egg crate' forms. You should be able to find a few books on how this is doen thru Classic Motorbooks.