Coating composition comprising an oxidatively drying polyunsaturated condensation product, a polythiol, and a siccative

Coating composition and its use in a one-pot system. The coating composition comprises:an oxidatively drying polyunsaturated condensation product, such as an alkyd, having pendant groups in an amount of more than 20% by weight of the condensation product, the pendant groups comprising unsaturated CC bonds;a polythiol having two or more SH-groups;a siccative.The equivalence ratio of thiol functional groups to unsaturated CC bonds being less than 0.3, preferably between 0.01 and 0.25. The coating composition comprises 1-30 wt-%, preferably 3-20 wt-%, of thiol compounds, related to the total weight of solid resin. The coating composition further comprises a drying accelerating complexing agent, preferably 2,2'-bipyridyl or 1,10-phenantroline.