A process for producing a repair coating on at least one metallic surface that is coated with at least one corrosion protection coating A applied with at least one composition selected from the group of A1) pretreatment compositions like activating compositions, passivating compositions, phosphating compositions, titanium compound(s) or zirconium compound(s) or both of them containing compositions and after-rinse-compositions, A2) organic compositions like primers, wet-primers, welding primers, e-coats, powder coats, base-coats and clear-coats and of A3) silicon compound(s) containing compositions that are solutions or dispersions containing at least one silicon compound selected from silanes, silanols, siloxanes and polysiloxanes and, whereby the at least one corrosion protection coating A has been at least partially removed in the area Z by grinding, sanding, sandblasting or paint stripping or any combination of them, whereby a thin corrosion protection coating B containing at least one silicon compound is applied with a solution, dispersion or paste (= "siloxane composition") containing at least one silane, at least one silanol, at least one siloxane or any mixture of these on at least a part of the area Z a) by spraying or b) by contacting a tool that contains and dispenses the siloxane composition which is a solution or dispersion containing at least one silicon compound selected from silanes, silanols and siloxanes or c) by using a tool with a storage chamber having a membrane or another porous material with the ability to transmit the siloxane composition from the storage chamber to the working surface of the tool or d) by contacting with a tool that transmits or relieves a portion of a paste which is a composition containing at least one silicon compound selected from silanes, silanols and siloxanes when it is brought into contact with the surface to be coated, whereby the siloxane composition is a solution or dispersion that contains at least one silicon compound selected from silanes, silanols and siloxanes as well as a content of at least one compound selected from compounds of complex fluorides or carbonates or nitrates or organic compounds of titanium, hafnium or zirconium or even any mixture of these. A1) pretreatment compositions like activating compositions, passivating compositions, phosphating compositions, titanium compound(s) or zirconium compound(s) or both of them containing compositions and after-rinse-compositions, A2) organic compositions like primers, wet-primers, welding primers, e-coats, powder coats, base-coats and clear-coats and of A3) silicon compound(s) containing compositions that are solutions or dispersions containing at least one silicon compound selected from silanes, silanols, siloxanes and polysiloxanes and, a) by spraying or b) by contacting a tool that contains and dispenses the siloxane composition which is a solution or dispersion containing at least one silicon compound selected from silanes, silanols and siloxanes or c) by using a tool with a storage chamber having a membrane or another porous material with the ability to transmit the siloxane composition from the storage chamber to the working surface of the tool or d) by contacting with a tool that transmits or relieves a portion of a paste which is a composition containing at least one silicon compound selected from silanes, silanols and siloxanes when it is brought into contact with the surface to be coated,