TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The functional groups on the surface of the polymeric substrate film are selected from carboxylic acid, sulfonic acid, aziridine, amine, isocyanate, melamine, epoxy, hydroxy and/or anhydride.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The fluoropolymer coating comprises the compatible adhesive polymer (1-40 wt.% based on fluoropolymer solids content). The fluoropolymer coating further comprises pigment. The fluoropolymer coating further comprises pigment (1-35 wt.% based on fluoropolymer solids content). Preferred Components: The polymeric substrate film comprises a primer layer on its surface providing the functional groups that interact with the adhesive to promote bonding of the fluoropolymer coating to the substrate film. The compatible adhesive polymer is a functional acrylic polymer. The compatible adhesion-promoting polymer is an amine functional acrylic polymer. The fluoropolymer is selected from polyvinyl fluoride homopolymer and copolymers of vinyl fluoride comprising vinyl fluoride (at least 60, especially 80 mole.%). The fluoropolymer coating is on both surfaces of the substrate film. The substrate film comprises thermoplastic polyester. The primer comprises a polymer selected from polyallylamine/melamine polymer, polyethylene imine polymer, ethylene acrylic acid copolymer, and acid modified polyolefin. The fluoropolymer coating has a thickness of 0.1-2 mils. The substrate film has a thickness of 0.5-10 mils. The primer layer has a thickness of 20-100 nm. The surface of the substrate film is activated. The substrate film comprises filler. The thermoplastic polyester of the substrate film is selected from polyethylene terephthalate, polyethylene naphthalate, and a coextrudate of polyethylene terephthalate/polyethylene naphthalate. EXAMPLE - A substrate was coated with Lupasol P (RTM: polyethyleneimine (PEI) coating) (100 microns) (coating thickness of 20 nm). A film comprising the substrate and a fluoropolymer coating on the polymeric substrate film was prepared. The coating comprised (wt.%) of epoxy functional acrylic (4) and polyvinyl fluoride homopolymer (PVF) dispersion (20). Peel strength of the film was tested. The film showed peel strength of 1.18 KG/inch at 200 degrees C bake temperature.