A one-component powder coating composition comprising a curable resin and one or more curing additives for curing the curable resin, wherein the powder coating composition comprises: - one powder coating component comprising the curable resin and the one or more curing additives; and - in the range of from 1.0 to 20 wt% of a dry-blended inorganic particulate additive consisting of inorganic components i), ii), and iii), wherein component i) is non-coated aluminium oxide or non-coated silica, component ii) is aluminium hydroxide and/or aluminum oxyhydroxide, and component iii) is silica, and wherein, if component i) is non-coated silica, component iii) does not comprise non-coated silica, wherein the dry-blended inorganic particulate additive comprises in the range of from 50 to 99 wt% of inorganic component iii), wherein the wt% of the dry-blended inorganic particulate additive is based on the weight of the one powder coating component, and wherein the powder coating component has a particle size distribution with a D v 90 of at most 50 μm and a D v 50 of at most 30 μm, wherein D v 90 and D v 50 are determined by laser diffraction according to ISO 13320 using the Mie model, wherein if the powder coating component has a particle size distribution such that D v 90 is at most 25 μm and D v 50 is at most 12 μm, the powder coating composition comprises in the range of from 8.0 to 20 wt% of the dry-blended inorganic particulate additive, based on the weight of the one powder coating component, and wherein if the powder coating component has a particle size distribution such that D v 90 is in the range of from above 25 to 50 μm and D v 50 is in the range of from above 12 to 30 μm, the powder coating composition comprises in the range of from 1.0 to 8.0 wt% of the dry-blended particulate additive, based on the weight of the one powder coating component. - one powder coating component comprising the curable resin and the one or more curing additives; and - in the range of from 1.0 to 20 wt% of a dry-blended inorganic particulate additive consisting of inorganic components i), ii), and iii), wherein component i) is non-coated aluminium oxide or non-coated silica, component ii) is aluminium hydroxide and/or aluminum oxyhydroxide, and component iii) is silica, and wherein, if component i) is non-coated silica, component iii) does not comprise non-coated silica, wherein the dry-blended inorganic particulate additive comprises in the range of from 50 to 99 wt% of inorganic component iii), component iii) is silica, and wherein, if component i) is non-coated silica, component iii) does not comprise non-coated silica, wherein the dry-blended inorganic particulate additive comprises in the range of from 50 to 99 wt% of inorganic component iii), wherein the wt% of the dry-blended inorganic particulate additive is based on the weight of the one powder coating component, and wherein the powder coating component has a particle size distribution with a D v 90 of at most 50 μm and a D v 50 of at most 30 μm, wherein D v 90 and D v 50 are determined by laser diffraction according to ISO 13320 using the Mie model, wherein if the powder coating component has a particle size distribution such that D v 90 is at most 25 μm and D v 50 is at most 12 μm, the powder coating composition comprises in the range of from 8.0 to 20 wt% of the dry-blended inorganic particulate additive, based on the weight of the one powder coating component, and wherein if the powder coating component has a particle size distribution such that D v 90 is in the range of from above 25 to 50 μm and D v 50 is in the range of from above 12 to 30 μm, the powder coating composition comprises in the range of from 1.0 to 8.0 wt% of the dry-blended particulate additive, based on the weight of the one powder coating component.