I was rather surprised at the "Alcoa" interior?   Generally aircraft interiors were zinc chromates, that semi baby **** green color so often seen in cockpits of the. era.     The Grand Coulee Dam on the Columbia was a major resource for war production during WWII, providing electricity for Aluminum production and providing nearby Boeing with raw material.
Grok had this to say:
Yes, the interior of the Boeing B-17 Flying Fortress was commonly coated with zinc chromate primer (often in a green tint, known as "zinc chromate green") on structural components, wiring conduits, and other metal surfaces for corrosion protection and as a base for camouflage paints. This was standard practice during World War II production.
However, not the entire interior was uniformly painted this way—variations existed by production block, manufacturer (Boeing, Douglas, or Vega), and combat modifications:
				
			Grok had this to say:
Yes, the interior of the Boeing B-17 Flying Fortress was commonly coated with zinc chromate primer (often in a green tint, known as "zinc chromate green") on structural components, wiring conduits, and other metal surfaces for corrosion protection and as a base for camouflage paints. This was standard practice during World War II production.
However, not the entire interior was uniformly painted this way—variations existed by production block, manufacturer (Boeing, Douglas, or Vega), and combat modifications:
- Early models (B-17C/D) often featured natural metal or aluminum-painted interiors in crew areas like the nose and radio compartment, with zinc chromate used sparingly on unexposed parts.
- Later models (B-17E/G) more consistently applied zinc chromate green to bulkheads, floors, and equipment, though some areas (e.g., bomb bay interiors) remained natural metal.
- Crews in theater frequently overpainted or stripped sections for weight reduction or personal reasons, leading to mixed appearances.
 
				 
 
		 
 
		
 
 
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		 ) Atm the cake itself is not worthy yet to display in the shop window... Lets hope they work day and night in the bakery to make that happen.
) Atm the cake itself is not worthy yet to display in the shop window... Lets hope they work day and night in the bakery to make that happen. 
