Method for producing repair sheet and method for managing repair sheet

A method for producing a repair sheet for repair of a coating film of a vehicle body, comprising:

• a first step of detachably attaching a nonpolar resin plate to a position on a dummy vehicle body corresponding to a repair area comprising a coating film in need of repair;
• a second step of supplying the dummy vehicle body to a topcoat application line that is the same as that for a vehicle body to be actually coated and forming either a pigment layer or a clear layer, or both of the pigment layer and the clear layer on the nonpolar resin plate under a condition equal to that for topcoat application to the vehicle body to be actually coated;
• and
• a third step of supplying the dummy vehicle body to a coating drying line that is the same as that for the vehicle body to be actually coated and drying the nonpolar resin plate having either the pigment layer or the clear layer formed thereon or having both of the pigment layer and the clear layer formed thereon under a condition equal to that for coating drying of the vehicle body to be actually coated.