PURPOSE: To finish an article in a two-color uneven pattern in two steps, by applying a pattern spray material to the article to form the first flat layer, and by applying a pattern spray material having a color different from the first layer to form the second layer.

CONSTITUTION: A repairing material, e.g. concrete, is applied to the surface of an article, e.g. concrete, mortar, etc. to effect ground preparation. The surface is cleaned and adjusted to pH≤10, and a pattern spray material consisting of an acrylic resin or polyurethane coating material is applied to the surface by a roller or spray gun to form the first flat layer of coating weight 0.2W0.5 kg/m2. A pattern spray material having a color different from the first layer, consisting of an acrylic resin or polyurethane coating material is applied by a mortar gun of 4 to 9mm caliber to form the second layer of coating weight 0.5W4.0 kg/m2.