Thanks George. Not sure about Okinawa but it would have been much simpler and quicker to use stencils and just spray the white on SBG. I think I've convinced myself that in Korea the checks were white-blue.......
https://www.asisbiz.com/il2/Corsair/...g-1952-01.html
They were originally designed by 1/Lt. J.J.E. Holden in WW2 as "white on Navy Blue" and the insignia by M/Sgt. J.R. Wroble, authorised by HQUSMC Washington.
Bill Tuxbury was a VMF-312 pilot in Korea, his son has his white-blue check scarf.
The Corsair in the National Naval Aviation Museum at Pensacola has plane white checks as WR-18 (not sure if still there).
No big deal though. Glossy Sea Blue is so dark it's sometimes hard to tell from black.
Regards
Nick