Hello Matt, sure I can share my thoughts on this. First of all I wanted to keep the general look of aluminium structure with all its details and shine covered with untinted, raw zinc chromate. Secondly my idea was trying to follow the manufacturing process to see how will it affect the look of the model (treating the whole process more like small study). Besides that I generally assumed a slight drift towards licencia artistica than strictly keeping to 'ready-made' colors.
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As Zinc Chromate does not refer to a paint color, but to a protective coating, (the precise color of it was not as important as the chemical composition) its natural tone is a bright greenish-yellow coming from crystalline salts.
Raw Zinc Chromate would also seem as semi-translucent not opaque like ready-made paints, and additionally aircraft manufacturing instructions often referred to just one coat of primer, thus the underlying surface would have distinct effect on the final look - raw untinted Zinc Chromate applied to aluminium would look like lime or apple green. On top of that my thought was that bright interior coating added to aluminium surfaces underneath caused excessive glare and eyestrain for the crews therefore a directive issued by the USAAF during the war specifically prohibiting the use of plain Zinc Chromate in occupied areas (not ot mention its toxic characteristics).
Keeping all that in mind I started with shiny black Base (Alclad) and followed with Aluminium Airframe (Alclad). Then using undiluted water-based inks prepared a heavy filter. Going with yellow and cyan gives the opportunity to balance in your own green shade. Application is quite straightforward with an airbrush. One tip tho - undiluted inks force very thin and delicate airbrushing as each layer shifts the color significantly from yellow to green - but on the other hand it gives you also the possibility to control the final color to your liking.
What is still left to be done what I'm considering is to cover it with semi-matte or Klear Kote Light Sheen to slightly reduce the reflectivity.
cheers
Bart
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