Gael,
It may depend on the model. Most shelves are not directly attached to walls but to cabinets and closets which are then attached to the wall. The exception is the overhead lockers. Anything attached to the walls should be riveted with blind rivets (pop rivets), and if possible to a rib or stringer under the interior skin.
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Sail on silver girl. Sail on by. Your time has come to shine.
On my '63, almost everything was attached with flat head wood screws thru the cabinets/dividers/lockers and into the aluminum walls. Some of these had wooden plugs covering the screw head to hide it.
You can use these for wall dividers and shelves. Very hard to apply to a curved wall....the old Airstreams gad them made with aluminum which would bend to wall contours easily. Maybe in France you can find something similar.Bulkhead Moulding
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