XF-21 Flat Sky, acrylic paint, 23 ml jar

XF-21 Flat Sky is an acrylic paint for scale model finishing, supplied in a 23 ml jar that keeps the shade clearly identified and close at hand during detail work. The Flat Sky tone and flat surface effect suit builds that call for a muted, low-sheen colour rather than a reflective finish, whether the focus is a cockpit section, an exterior panel or a small correction after assembly. The acrylic formula supports measured brush application on selected areas where clean edges and controlled coverage matter. The 23 ml volume gives a practical amount for repeated touch-ups, small parts and colour matching across separate sections of the same build. The jar format also helps keep the paint organised on the bench, with the XF-21 code and Flat Sky name easy to spot when several shades are in use. The source data identifies hazard pictograms for flammable material and warning handling information, so the paint should be used with appropriate care during model-making sessions. On the workbench, XF-21 Flat Sky fits naturally into painting stages that move between base coating, detail correction and final visual balancing. It also works well when a build calls for the same muted shade on more than one component, helping separate painted sections stay visually consistent across the finished model.