Acrylics has an excellent concistency and is alkali resistant. The acrylic paint can be diluted with water and dries quickly to give a waterproof finish. Thin layers dry within 30 minutes at room temperature. The coulours are mixable. Make sure the working temperature is not lower than 10°C and preferably use nylon or other inexpensive brushes, because acrylic paint dissolves the natural fats in animal hairbrushes (e.g. sable).