The use of decorative foils has emerged as an alternative to coating plastic add-on parts; inpro started researching foil technology in 2002, developing also a prototypical process chain. By the end of 2004, principle suitability had been demonstrated. In this technology, unlike with plastic coating, a foil is painted in the car colour with a so-called line coater, even before the component is produced. After thermoforming this foil and back-foaming or back-moulding with a glass-fibre-reinforced polymer matrix, the finished component is ready for assembly to the painted car body.
inpro was able to demonstrate the potential of this technology for the serial coating of plastic components. Research on various foil painting scenarios proved that foil technology is also attractive from an economic standpoint. The foil method is an innovative technology with significat application and process potential. In 2008, the VW Passat CC model underwent a serial conversion.