Vallejo 77711 Magnesium 32ML. Metal Color is a range of acrylic metallic paints designed for airbrushing. They contain latest generation pigments with exceptional resistance and adhesion to plastic and metal. They can be applied directly to many surfaces without the need for primer, although a gloss black primer is recommended for best results. Shake well before use. Metal Color dries almost immediately, but we recommend waiting about an hour until the surface is completely hardened.