The Mr Hobby Gundam Markers - Brush Type 21 Gray from the Gundam Markers range provides a soft-tipped line marker pen that easily moults into panel lines. How To Use: It takes about a day or two to completely dry. It may take longer to dry if the humidity is high. Must only be used on plastic models. Painting on ABS plastic is not recommended as the ink may damage the surface. Put the lid back on after use. Safe for use with Mr Color, Aqueous Hobby Color, Gundam Color and Gundam Marker. Remove any excess paint by using a swab or rubber eraser. Manufacturer: Mr HobbyModel: GM-21 Gundam Markers - Brush Type 21 Gray