The invention relates to a process for repairing coated substrate surfaces comprising the following successive steps:

• a) optionally, preparing a blemished area to be repaired,
• b) providing at least one backing film coated on one side with an uncured or at least only partially cured coating layer of a thermally curable coating composition,
• c) applying the at least one backing film with its coated side onto the blemished area to be repaired,
• d) supplying thermal energy to the coating applied in this manner onto the blemished area to be repaired and
• e) removing the at least one backing film, wherein

  the supply of thermal energy onto the coating proceeds through the at least one backing film, and/or after removal of the at least one backing film.