All color should be used with model 12 – Activator for a perfect auxiliary blooming effect. No nail curing needed. Model 12 – Activator is used to activate the marble effect and is a transparent color. When the color is applied with the model 12 – Activator, it will naturally blend out. After blending each color, wash the brush with clean water before applying other colours to prevent mixing other colors and the smudge of Activator.