The underbody is the most affected (besides the bottom), but fortunately, repair parts are available for that.
The rear wheelarches are available as a complete replacement part, but if most of it is still in good shape, you can just tackle the bad part.
The part shown here replaces the lower part before the rear wheel. If you need a complete part or another related repair part, it is listed in the "alternatives" and/or "related parts" tab.
Useful information from Paruzzi magazine and from our YouTube channel :
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