Model Colour is indicated for all surfaces, and especially formulated to adhere to Plastics and Polyesters. The colours brush on smoothly, and cover evenly. The colours contain the largest range of colours in their range. They can be diluted with water and with all other Vallejo colours. The colours are resistant to washing. It is recommended to apply them with a brush or airbrush. For airbrush application, dilute with water and airbrush thinner.