" A better solution, PHEON!"
Well Rick, looks like the decals, as the Kit itself, are less then ideal! I've pre-ordered the Pheon Decals as well, and the ones in the box will stay there......
The effect of the coloured pencils on your wing looks promising, I think I'll experiment on some scrap a bit however it does create the effect of a stain over paint or varnish quite nicely. I'm also "warming" to the two vs. three coloured approach as proposed by Bughunter, it just seems far too logical an interpretation to not consider seriously.
Looking good! 
Cheers,
Lance
I also like Bughunters theory with one Caveat. The amount of stain listed in the drawing was
Just enough using all four colors to cover the wing. Providing I remember all of the discussions on the Drome regarding Achims' build correctly.
RAGIII
PS: Another theory could be that the brown and green were mixed and used on the uppers, and the Violet and blue mixed for the unders. After all there is no real proof that all EVs had a division between colors, at least in my opinion

That being said I am going to stick with the 4 color as you probably can tell
