Abstract: The present invention relates to a composition based on plasticized polyvinyl chloride (PVC) thermoplastic resins for producing a layer of a composite structure or skin, said layer being provided on its outer surface with a coating, characterized in that the composition comprises, expressed as percent by weight: —from 40% to 60% of one or more PVC resins with a K value of between 50 and 80. —from 30% to 50% of one or more types of plasticizers, at least one of which is polymeric in nature, or is a heavy monomeric plasticizer, —from 1% to 20% of additives, such as pigments or fillers, stabilizers, antioxidants, processing additives and lubricants. The invention also provides the process for producing these composite skins by moulding, and their use for parts of the passenger compartment of automotive vehicles, such as, in particular, airbag-equipped dashboards.