Pretty sure they mark the wing fuel Tanks as a warning marking, as i have also painted the small Red access covers to those wing tanks on the upper wings.
Masks off the Canopies. Sections fitted to EI-309 and Full Canopy to AI-311 bases of Pitot Tubes to Port wings, Clear Panel viewing windows added to fuselage sides and bottom of wing-centre fuselage.
EI-309 is approaching the finishing line with canopy sections all in place now, Gun assembled and installed, Prop in place antenna done, Pitot tube finished and Bombs in place too.
Torpedo work in progress for AI-311 , scratch built the extra wooden Fins required for the shallow waters of Pearl Harbor......