A method for application of a metal on a substrate, said method comprising the steps: a) providing a substrate, wherein at least a part of the surface of the substrate comprises at least one selected from the group consisting of an abstractable hydrogen atom and an unsaturation, b) contacting at least a part of the surface of the substrate with at least one polymerizable unit, at least one initiator, and optionally at least one solvent, wherein said at least one polymerizable unit is able to undergo a chemical reaction to form a polymer comprising at least one charged group, wherein said at least one initiator has the ability to be activated by both heat and actinic radiation, and wherein said at least one initiator is a mixture of a compound that can act as an initiator and an energy transfer compound which can absorb energy in actinic radiation and transfer energy to the compound acting as an initiator, causing action of the at least one initiator. c) inducing a polymerization reaction by exposure to both heat and actinic radiation adapted to said at least one initiator to form polymers on at least a part of the surface of said substrate, said polymers comprising at least one charged group, and said polymers forming covalent bonds after reaction with at least one selected from an abstractable hydrogen atom and an unsaturation on said substrate, d) depositing a second metal on an already applied first metal to obtain a metal coating, wherein at least one of the following additions is made to apply the first metal on the polymers at least once at a point selected from: before step b), between steps b) and c), and between steps c) and d): i) addition of ions of at least one first metal and reducing said ions to metal, wherein a) said ions have the opposite sign of the charge compared to said at least one charged group on said polymer, or b) wherein said ions have the same sign of the charge compared to said at least one charged group on said polymer and wherein at least one chemical compound is added and at least partly adsorbed to the polymer comprising at least one charged group, said at least one chemical compound comprising at least one charge with a sign opposite compared to said ions, ii) addition of metal particles of at least one first metal, wherein said particles have a diameter in the range 1-1000 nm, wherein said polymerization reaction is induced by heat and UV-light adapted to said at least one initiator, characterized in that the initiator is at least one selected from the group consisting of ketone peroxides, diacyl peroxides, dialkyl peroxides, peroxyesters, peroxyketals, hydroperoxides, peroxydicarbonates, peroxymonocarbonates, and 2,2-azo di(isobutyronitrile)(AIBN). a) providing a substrate, wherein at least a part of the surface of the substrate comprises at least one selected from the group consisting of an abstractable hydrogen atom and an unsaturation, b) contacting at least a part of the surface of the substrate with at least one polymerizable unit, at least one initiator, and optionally at least one solvent, wherein said at least one polymerizable unit is able to undergo a chemical reaction to form a polymer comprising at least one charged group, wherein said at least one initiator has the ability to be activated by both heat and actinic radiation, and wherein said at least one initiator is a mixture of a compound that can act as an initiator and an energy transfer compound which can absorb energy in actinic radiation and transfer energy to the compound acting as an initiator, causing action of the at least one initiator. c) inducing a polymerization reaction by exposure to both heat and actinic radiation adapted to said at least one initiator to form polymers on at least a part of the surface of said substrate, said polymers comprising at least one charged group, and said polymers forming covalent bonds after reaction with at least one selected from an abstractable hydrogen atom and an unsaturation on said substrate, d) depositing a second metal on an already applied first metal to obtain a metal coating, i) addition of ions of at least one first metal and reducing said ions to metal, wherein a) said ions have the opposite sign of the charge compared to said at least one charged group on said polymer, or b) wherein said ions have the same sign of the charge compared to said at least one charged group on said polymer and wherein at least one chemical compound is added and at least partly adsorbed to the polymer comprising at least one charged group, said at least one chemical compound comprising at least one charge with a sign opposite compared to said ions, ii) addition of metal particles of at least one first metal, wherein said particles have a diameter in the range 1-1000 nm,