TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The coating composition further comprises 0.2-15 wt.% of at least one monomeric, aromatic, optionally substituted carboxylic acid(s) whose carboxyl group is in conjugation to pi -electron system. Preferred Components: The component (A): comprises perfluoroalcohols of formulae (CF3-(CF2)x-(CH2)y-O-Az-H) (I) and (CR13-(CR22)x-(CH2)y-O-Az-H) (II); and is present in an amount of 0.1-10 wt.%. The polyalkylene oxide structural unit (Az) comprises homopolymers, copolymers or block polymers of alkylene oxides, polyoxyalkylene glycols or polylactones. The reaction product comprises: (i) one or more aliphatic and/or cycloaliphatic diisocyanates with two differently reactive isocyanate groups; (ii) one or more (per)fluoralkylmonoalcohol component; and (iii) one or more compounds (V) having at least one carboxyl- and/or hydroxyl group and at least one acrylic and/or methacrylic unsaturated double bond, preferably hydroxyalkyl acrylate, hydroxyalkyl methacrylate, hydroxyalkyl acrylate reacted with lactone and/or hydroxyalkyl methacrylate reacted with lactone. The component (A) further comprises one or more saturated perfluoroalkyl- and polyhydroxyl group-containing polyacrylate, one or more saturated perfluoroalkyl-and polyhydroxy-containing polymethacrylates, or a mixture of one or more saturated perfluoroalkyl- and polyhydroxy group-containing polyacrylates and one or more saturated perfluoroalkyl- and polyhydroxyl group-containing oolymethacrylates. The saturated poly(meth)acrylate comprises isophorone diisocyanate, 2-(perfluorohexyl)-ethanol and hydroxyethyl acrylate, hydroxyethyl methacrylate, hydroxyalkyl caprolactone-acrylate and/or hydroxyalkyl caprolactone-methacrylate. The amount of the: diisocyanates is 1 mole; (per)fluoroalkyl monoalcohol components is 1 mole; and ethylenically unsaturated compounds having group reactive towards isocyanate groups is 1 mole. The used poly(meth)acrylate(s) are saturated, and are composed of 0.05-15 wt.% of one or more fluorine-containing ethylenically unsaturated reaction products, 10-50 wt.% of one or more hydroxyl-containing monomers, 10-89.95 wt.% of one or more alkyl and/or cycloalkyl of ethylenically unsaturated carboxylic acids, 0-50 wt.% of one or more vinylaromatic compounds, and 0-10 wt.% of further ethylenically unsaturated monomers. The poly(meth)acrylates have a hydroxyl number of 60-300 mg potassium hydroxide (KOH)/ g, preferably 70-200 mg KOH/g, and a glass transition temperature of -100 degrees C to 100 degrees C, preferably -60 degrees C to 60 degrees C.R1, R2 = H, F, CF3, where R1 and R2 are not H;A = CRa1Rb1-CRc1Rd1-O, (CRa1Rb1)a-O or CO(CRa1Rb1)b-O;Ra1Rb1Rc1Rd1 = H, alkyl, cycloalkyl, aryl, or organic radical having 1-25C;x = 1-20;y = 1-6;z = 0-100; anda, b = 3-5.Preferred Method: After the applying step, the coating composition is hardened at a temperature of 20-80 degrees C, preferably 20-60 degrees C. The optionally precoated substrate is an aircraft or a wind turbine or one or more parts of wind-turbine rotor blades. The coating composition is applied, as an outermost coating layer, on the wind-turbine rotor blades. EXAMPLE - Typical non-aqueous coating composition comprised of: 22 wt.% of butyl acrylate; 15.50 wt.% of methyl methacrylate; 32 wt.% of hydroxyethyl methacrylate; 30 wt.% of styrene; 5 wt.% of fluorine monomer 1 (hydroxyethyl methacrylate/isophorone diisocyanate/fatty alcohol); 0.50 wt.% of acrylic acid; and 7 wt.% of di-tert-butyl peroxide.