I have the Wizz Air A320 decals, and I am looking for a more professional, calculated approach (than those that come with the decal instructions) to matching the paint color of the front of the fuselage and engines to the that of the decals. The decal instructions say to mix 1:9 white to red, but that’s a shot in the dark. Does anyone know of a more proven approach to doing this, or know on what forum or who I might ask? Thanks very much, William.