Now all is ready to apply streaks: The basic technique involves Mixing black and yellow oils to create an Olive Green. depending on your feelings about the color of these streaks add a little red( very little) to adjust to your liking. The more red the more BROWN!
I use a 50/50 mix of the black and yellow, and just a drop of red. Here is what it looks like after mixing:

I begin by applying the oils to the areas that will end up as the darkest streaks. I use a 1/4 or 1/8 flat brush depending on scale:

Next I wet the flat brush and begin pulling it through the pigment in the direction I want the streaks to go. I move from leading to trailing edge and left to right. This spreads out the paint leaving various light and dark areas.

The next steps are using a wider flat brush and removing pigment where you want the lighter cdl showing through, and inevitably adding a little pigment where you remove too much. The oils are forgiving and can be totally removed( At least a couple of times) without damaging your acrylic base. Work WET but not dripping wet


I then use a wide flat brush to smooth things out. Look at the pictures of your subject to get ideas on where you want the light and dark!

Next a fan brush to begin to smooth things even more.

Last is a big very soft brush as the final smoothing agent. The technique is the same for the fuselage and tail surfaces just pull the oils down vertically on the fuselage sides.
