After processing the model with scrapers & grinders a priming is recommended before the actual application of colour. Even when lighter colour shades are to be applied on a dark background, it is recommended to prime the surface beforeh&, in order to get a perfect colour finish.
This priming is mixed ready to spray & an air-brush gun is suitable for the application. After the priming the color shades of Revell Aqua Color colour range should be used.