I`m planning to build the Roden Staggerwing in its lively pre-war US Embassy livery. But will it be any difference going for matt colours and add a layer of clear gloss on top of that, instead of using gloss blue and yellow?
And speaking of blue, is FS:35109 correct for the pre-war blue?
Then once the decals are applied you can adjust the final finish. I often mix Testor's Dulcoat and Gloscoat to the level of sheen I want.
As for the color, FS is an approximation but close. I cannot remember if I mixed the blue for mine or used an old Polly S color Blue 23. The Army seemed to have two version of Blue 23, one being a bit more turquoise.