First layer of primer paint (i think gray one, this step was made by my father, who is a modellist) with an airbrush, second layer of red tamiya spray paint, black gunze (don't remember if acrilic or oil) for details with airbrush and a little brush (for start-select) and finally two layers of transparent paint given with airbrush so the whole paintwork will last longer to my highly sweating hands. A and B were made with the same process