TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The organotin compound is dibutyl tin dilaurate, dibutyl tin dichloride, stannous octanoate, dibutyl tin dilaurylmercaptide and/or dibutyltin diisooctylmaleate. The cocatalyst is organozinc compounds and/or organobismuth compounds. The mixed catalyst has a solids weight ratio of main catalyst to co-catalyst of 0.005:1-200:1, preferably 0.1:1-2:1. The main catalyst is present in an amount of 0.005-0.1, preferably 0.01-0.02 parts per hundred parts fluoropolymer resin solids. The cocatalyst is present in an amount of 0.05-1, preferably 0.1-0.2 parts per hundred parts fluoropolymer resin solids.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: (I) further comprises pigment. Preferred Components: The crosslinking agent comprises a blocked isocyanate functional compound. The pigment comprises titanium dioxide.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The compatible crosslinkable adhesive polymer comprises polycarbonate polyol. The compatible crosslinked adhesive polymer is polyester urethanes, polycarbonate urethanes, acrylic polyurethanes, polyether urethanes, ethylene vinyl alcohol copolymer urethanes, polyamide urethanes and/or polyacrylamide urethanes. The polymeric substrate film comprises polyester, polyamide and/or polyimide. EXAMPLE - Coating composition was made from 148 g of stock resin solution A (prepared by dispersing 36.5 wt.% of polyvinyl fluoride (PVF) polymer into a mixture of propylene carbonate:butoxy ethyl acetate (4:1), adding 5 wt.% of Desmophen C-3100 (RTM: Linear, hydroxyl-terminated, aliphatic polycarbonate diol) into the dispersion) by adding various catalyst solutions. To the coating composition, 19.7 g of isocyanate solution C (7.4 wt.% solution of Desmodur N-3300 (RTM: Solvent-free aliphatic polyisocyanate resin based on hexamethylene diisocyanate)) or BC (14.8 wt.% of solution of Desmodur PL-350 (RTM: blocked aliphatic polyisocyanate based on hexamethylene diisocyanate trimer)), was added. 0.015 parts per hundred parts fluoropolymer resin (pph) of dibutyl tin dilaurate and 0.15 pph of bismuth, 0.15 pph of acetic acid and 32 g of titanium dioxide pigment dispersion Y were added. The coating composition was stirred for 2 minutes, and then coated as a 5 mil thick wet drawdown on polyester and cured at 220 degrees C for 60-120 seconds.