Quote:
Originally Posted by Superleggera
Remember the entire aluminum roof skin "floats" except screwed/crimped attachment typically at door and window openings and lower attachment. I've seen canvas and burlap used to wrap the steel inner structure (which typically isn't perfectly smooth -- see other phots) and held in place with binding (cotton or ??? -- I can't remember anymore). The chassis and bodywork structures on these flexed and the aluminum skin needs to flex accordingly to avoid binding or damaging itself. (ditto for thermal expansion in the sun) It seems rather simplistic but it works given the very large size of the welded cockpit bodywork aluminum panel. Galvanic corrosion was not why they did this.
Good eye. Most people miss entirely the canvas aspect.
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Likewise, I have also found cotton felt, canvas and burlap in the Touring bodywork, and brushed over with hot tar. I replaced the felt but not the burlap and hot tar - show judges are universally unsympathetic to such accuracies ....
....the burlap/tar seals out the pernicious air flows - which arrive inside the car accompanied by dirt, mud and etc. accoutrements ...... Must be nice to arrive with clean luggage ....