Looking forward to this one. I think a bare metal finish would be quite striking.
"You watch the world exploding every single night Dancing in the sun a newborn in the light, Brothers and their fathers joining hands and make a chain The shadow of the Wicker Man is rising up again......" ------"The Wicker Man", by Iron Maiden
About the sink marks on the fuel tanks, 2 of them are just over the detailed part of the fuel tank, filling them means losing the details... I can always leave those fuel tanks off - cleaning and loosing the detail , or try some AM fuel tanks...