XF-21 Flat Sky, acrylic paint, 10 ml jar

XF-21 Flat Sky is an acrylic paint for scale modelling work, supplied in a 10 ml jar for compact storage and measured use at the workbench. The Flat Sky tone brings a subdued matte finish to painted sections, making it suitable for projects that call for a restrained colour rather than a glossy surface. The acrylic formula fits common modelling tasks such as detail painting, small corrections and colour application on selected sections of a build. A 10 ml size keeps the jar easy to place alongside other bench supplies and helps separate dedicated shades within a broader paint range. The XF designation identifies this specific colour within the series, which helps when returning to the same finish for later matching work. The jar format also supports controlled access to the paint during brush-based application. On aircraft, vehicle or display builds, XF-21 Flat Sky can be used where a matte painted area needs a consistent tone across smaller parts and surface details. It also suits touch-up work during longer projects, when the same shade needs to be revisited without mixing a new colour each time.