Casein paint can also be successfully used as wood paint. In order to paint wood surfaces, safflower oil is added to the paint to increase its elasticity and adhesion capability. Use 30–50 ml of safflower oil per 1 kg of paint powder. The oil is mixed in after the paint has set for 30 minutes and stirred once more. Keep stirring the paint with a drill while adding the oil. Oil must be poured in a fine stream.
In case of dirty painted surfaces, first clean them with soda (for example, art. No. 992). In such cases it is recommended to paint a test square before painting to ensure the suitability of the solution.