A method for producing a cast iron part, wherein the method combines surface modification by an in-situ casting with laser directed energy deposition (L-DED) and comprises the following stages: a) obtaining a reactive paint comprising at least one first metallic material and at least one binder, wherein the first metallic material is a metal alloy comprising: equal to or more than 10 wt. % of Cu + Al + Ni + Co + Mn, equal to or less than 0.05 wt. % of C, equal to or less than 30 wt. % of Cr, equal to or less than 15 wt. % of Mo, equal to or less than 4 wt. % of Ta, equal to or less than 3 wt. % of Si, equal to or less than 3 wt. % of Nb, equal to or less than 3 wt. % of V, equal to or less than 15 wt. % of W, equal to or less than 1 wt. % of each other unspecified element, wherein the total amount of unspecified elements is equal to or less than 5 wt. %, and Fe as balance; b) applying the reactive paint to a sand mould to obtain a sand mould at least partially coated with reactive paint; c) drying the sand mould at least partially coated with reactive paint; d) casting a cast iron melt comprising Ceq wt. % = C wt. % + 1 / 3 × Si wt. % = Eutectic ± 0.2, 1.40 to 3.40 wt. % of Si, equal to or less than 2.0 wt. % of Cu, 0.10 to 0.40 wt. % of Mn, and iron as balance; wherein this stage comprises: pouring the cast iron melt into the dried sand mould at least partially coated with reactive paint, and cooling the poured cast iron melt to obtain a cast iron part comprising at least one surface portion modified with the first metallic material; e) conditioning the cast iron part obtained in stage d) by shot blasting or machining the surfaces of the cast iron to remove any residue from the sand mould, with the proviso that it leaves a minimum modified layer thickness of 0.15 mm; and f) depositing at least one layer of a second metallic material on at least one of the surface portions modified with the first metallic material, wherein said at least one layer of the second metallic material is deposited by laser directed energy deposition (L-DED), and said second metallic material is selected from an anti-corrosion material, an anti-wearing material, and an anti-corrosion and anti-wearing material; and it is an iron base alloy comprising equal to or more than 5 wt. % of Cr + Mo + Ni. a) obtaining a reactive paint comprising at least one first metallic material and at least one binder, wherein the first metallic material is a metal alloy comprising: equal to or more than 10 wt. % of Cu + Al + Ni + Co + Mn, equal to or less than 0.05 wt. % of C, equal to or less than 30 wt. % of Cr, equal to or less than 15 wt. % of Mo, equal to or less than 4 wt. % of Ta, equal to or less than 3 wt. % of Si, equal to or less than 3 wt. % of Nb, equal to or less than 3 wt. % of V, equal to or less than 15 wt. % of W, equal to or less than 1 wt. % of each other unspecified element, wherein the total amount of unspecified elements is equal to or less than 5 wt. %, and Fe as balance; equal to or more than 10 wt. % of Cu + Al + Ni + Co + Mn, equal to or less than 0.05 wt. % of C, equal to or less than 30 wt. % of Cr, equal to or less than 15 wt. % of Mo, equal to or less than 4 wt. % of Ta, equal to or less than 3 wt. % of Si, equal to or less than 3 wt. % of Nb, equal to or less than 3 wt. % of V, equal to or less than 15 wt. % of W, equal to or less than 1 wt. % of each other unspecified element, wherein the total amount of unspecified elements is equal to or less than 5 wt. %, and Fe as balance; b) applying the reactive paint to a sand mould to obtain a sand mould at least partially coated with reactive paint; c) drying the sand mould at least partially coated with reactive paint; d) casting a cast iron melt comprising Ceq wt. % = C wt. % + 1 / 3 × Si wt. % = Eutectic ± 0.2, 1.40 to 3.40 wt. % of Si, equal to or less than 2.0 wt. % of Cu, 0.10 to 0.40 wt. % of Mn, and iron as balance; wherein this stage comprises: pouring the cast iron melt into the dried sand mould at least partially coated with reactive paint, and cooling the poured cast iron melt to obtain a cast iron part comprising at least one surface portion modified with the first metallic material; 1.40 to 3.40 wt. % of Si, equal to or less than 2.0 wt. % of Cu, 0.10 to 0.40 wt. % of Mn, and iron as balance; wherein this stage comprises: pouring the cast iron melt into the dried sand mould at least partially coated with reactive paint, and cooling the poured cast iron melt to obtain a cast iron part comprising at least one surface portion modified with the first metallic material; pouring the cast iron melt into the dried sand mould at least partially coated with reactive paint, and cooling the poured cast iron melt to obtain a cast iron part comprising at least one surface portion modified with the first metallic material; e) conditioning the cast iron part obtained in stage d) by shot blasting or machining the surfaces of the cast iron to remove any residue from the sand mould, with the proviso that it leaves a minimum modified layer thickness of 0.15 mm; and f) depositing at least one layer of a second metallic material on at least one of the surface portions modified with the first metallic material, wherein said at least one layer of the second metallic material is deposited by laser directed energy deposition (L-DED), and said second metallic material is selected from an anti-corrosion material, an anti-wearing material, and an anti-corrosion and anti-wearing material; and it is an iron base alloy comprising equal to or more than 5 wt. % of Cr + Mo + Ni.