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Murena

Spoiler:

The Murena's chassis was a new design. In appearance it was very close to a full unitary body. The chassis differed from the Bagheera's in two significant ways; the rear cradle was reconfigured to accommodate a new rear suspension system, and the entire chassis was galvanised to prevent the Murena from falling victim to the rust problems that plagued the Bagheera.The Murena was the first production car to use galvanised steel for all chassis parts.
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The car's twelve major body panels were made of fibreglass-epoxy. According to Matra's general manager, Jean-Louis Caussin, these body panels were produced using a manufacturing process known as the "sheet moulding compound" moulding process.The new galvanised chassis coupled with the composite panels made the car essentially immune to rust, except for the rear suspension's trailing arms.

https://en.wikipedia.org/wiki/Matra_Murena