A coating composition comprising (i) a film forming resin comprising a) 60-90 weight % of one or more polyamine(s) containing secondary amine groups prepared by reacting one or more polyamine(s) comprising primary amine groups with an unsaturated dialkyl ester; and, b) 10-40 weight% of one or more ester(s) having the structure of Formula wherein X is a ester functional group having the structure of Formula or Y is a monovalent alkyl group having 1 to 10 carbon atoms, for example 1 to 6 carbon atoms, a is 1 or 2; b is 0, 1 or 2; Z is C or S, and when Z is C c is 0, and when Z is S c is 1 R 5 is a monovalent alkyl or arylalkyl group having 2 to 25 carbon atom; the dotted line represents an optional double bond; and formula does not contain N-atoms, wherein weight % is based on the sum of the weight of (a) and (b) in the film forming resin excluding solvent, and (ii) a polyisocyanate resin used to cure the film forming resin (i), wherein the polyisocyanate resin has an isocyanate equivalent weight of between 280 g/eq to 840 g/eq and a number average molecular weight of 550-2000 g/mol, wherein the isocyanate equivalent weight is measured by means of measuring the isocyanate group content by tritation using di-n-butylamine according to ASTM D2572-87, and the number average molecular weight is measured by GPC according to ISO-13885-1:2008 wherein component (i) and component (ii) are present in the coating composition in an amount so that the stoichiometric ratio of isocyanate groups:secondary amine groups is 1.0:1.0 to 2.5:1.0. (i) a film forming resin comprising a) 60-90 weight % of one or more polyamine(s) containing secondary amine groups prepared by reacting one or more polyamine(s) comprising primary amine groups with an unsaturated dialkyl ester; and, b) 10-40 weight% of one or more ester(s) having the structure of Formula wherein X is a ester functional group having the structure of Formula or Y is a monovalent alkyl group having 1 to 10 carbon atoms, for example 1 to 6 carbon atoms, a is 1 or 2; b is 0, 1 or 2; Z is C or S, and when Z is C c is 0, and when Z is S c is 1 R 5 is a monovalent alkyl or arylalkyl group having 2 to 25 carbon atom; the dotted line represents an optional double bond; and formula does not contain N-atoms, wherein weight % is based on the sum of the weight of (a) and (b) in the film forming resin excluding solvent, and a) 60-90 weight % of one or more polyamine(s) containing secondary amine groups prepared by reacting one or more polyamine(s) comprising primary amine groups with an unsaturated dialkyl ester; and, b) 10-40 weight% of one or more ester(s) having the structure of Formula wherein X is a ester functional group having the structure of Formula or Y is a monovalent alkyl group having 1 to 10 carbon atoms, for example 1 to 6 carbon atoms, a is 1 or 2; b is 0, 1 or 2; Z is C or S, and when Z is C c is 0, and when Z is S c is 1 R 5 is a monovalent alkyl or arylalkyl group having 2 to 25 carbon atom; the dotted line represents an optional double bond; and formula does not contain N-atoms, wherein weight % is based on the sum of the weight of (a) and (b) in the film forming resin excluding solvent, and Y is a monovalent alkyl group having 1 to 10 carbon atoms, for example 1 to 6 carbon atoms, a is 1 or 2; b is 0, 1 or 2; Z is C or S, and when Z is C c is 0, and when Z is S c is 1 R 5 is a monovalent alkyl or arylalkyl group having 2 to 25 carbon atom; the dotted line represents an optional double bond; and formula does not contain N-atoms, (ii) a polyisocyanate resin used to cure the film forming resin (i), wherein the polyisocyanate resin has an isocyanate equivalent weight of between 280 g/eq to 840 g/eq and a number average molecular weight of 550-2000 g/mol, wherein the isocyanate equivalent weight is measured by means of measuring the isocyanate group content by tritation using di-n-butylamine according to ASTM D2572-87, and the number average molecular weight is measured by GPC according to ISO-13885-1:2008