The invention relates to composition comprising at least one modified alkyd binder, selected from a (meth)acrylate modified alkyd binder and a vinyl modified alkyd binder, wherein the (meth)acrylate modified alkyd and the vinyl modified alkyd binder comprise at least one —C(R100)=CH2 group, wherein R100 is hydrogen or methyl； and at least one metal complex comprising a metal or a metal salt of an organic acid or inorganic anion and at least one ligand, wherein the metal is selected from Fe and Mn, and wherein said at least one ligand is a nitrogen donor ligand, selected from the group comprising monodentate, bidentate, tridentate, tetradentate, pentadentate and hexadentate nitrogen donor ligands.
