Abstract: It is an object of the present invention to provide a powder coating composition, which can exhibit a sufficient hiding power, a corrosion resistance and an excellent appearance and can reduce a coating process and is particularly suitable for coating of an aluminum wheel because of its high low temperature curability and has excellent storage stability, and a coating method of an aluminum wheel using the same. A powder coating composition consisting of a powder coating composition particle, wherein said powder coating composition particle comprises at least a thermosetting resin powder formed by binding a metallic pigment with a binder and said thermosetting resin powder comprises a ?-hydroxyalkylamide curing agent expressed by the following general formula (1): wherein R1 represents a hydrogen atom, a methyl group or an ethyl group, R2 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms or HOCH(R1)CH2—, and A represents a bivalent hydrocarbon group.

Abstract: The present invention relates to a matte powder coating composition comprising a powder coating (A) comprising a resin, a curing agent and a colorant, and a powder coating (B) comprising a resin and a curing agent without containing a colorant, wherein the powder coating (B) has a gelation time of 1200 seconds or less, and the difference in the gelation time of the powder coating (B) and the powder coating (A) is 400 seconds or more; a process for preparing the same; and a method for forming a matte coating film using the powder coating composition.