Cees:
No, no, never. Light colors first.
The Phoenix V I am building is going to be painted using Dave brown's original colors, that is white and copper poly (similar to a bronze). The wings/stab have a checkerboard scheme and the fuse is coopper poly and white.
What I was saying I am painting base coat of white which is what you see in the pictures, sand lightly, check for imperfections, then, a final coat of white over the areas that are going to be white without worrying to mask. Then once paintecd, mask off for the copper poly color and paint.

Before the next coat of paint, I am planning to install the control surfaces then continue with the painting.
But always paint light colors first followed by darker colors.

I am using Martin-Senuor (spelling??) Acrylic Enamel auto paint for the White and PPG Copper Poly for the other color (Dave Brown used the exact same paint). I think Crankpin can chime in here for that.