The model was primed in black, then I airbrushed the model with a mixture of Polly S 'dragon blue' mixed with Ral Partha 'dark blue'. I airbrushed successive layers that are lighter and lighter, adding more light gray into the mixture. When I finished that process I drybrushed 'Dragon blue' mixed with light gray for final highlights. After that I began the process of final details. The important thing is to break these kind of models into subassemblies.