The present invention provides a grime paint composition comprising a Grubbs' catalyst and a method of preparing a grime coat by thermosetting the composition at 15 to 150C, wherein the grime paint composition has a curing rate of And the physical properties of the coating film, such as surface hardness, are improved. The method for producing the yellowish coating film using the yellowish coating composition can economically and efficiently improve the hardening speed of the yellowish coat.;
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