Milky paste that causes cracking of the top layer of acrylic paints, ready to use directly from the jar. Directions for use: Using a dry, soft and clean brush, apply the undercoat to the selected surface. Preferably two layers. As soon as the last layer of the mass starts to dry, being only slightly sticky, you should start applying another color of acrylic paint, preferably contrasting with the color under the base mass. Stronger cracks can be obtained by changing the direction of the brush strokes in relation to the direction in which the undercoat was applied. The layer of new paint on the surface will crack immediately, revealing the color of the paint on the underside.