Not sure if it applies to the Beetle but bracing body work before separation with temp welded in braces. Think it was shown on the "Beetle crises" series on tv. Might be available to view online?
This guy shows the job on a Karmann Ghia. If memory serves my right he said it's the same on a beetle. (Word of warning, his style of presentation is a bit of an aquired taste, and he may swear a bit).