Today I painted a broken layer of red over the green on the handle. My string was based on Cadmium Red, desaturated with Terre Verte Hue, and darkened with a mixture of Raw Umber and Prussian Blue.
I really like the effect of the broken color. Painting the red went much quicker than the green, since all I was doing was changing the hue, while leaving the value alone. The technique is quite versatile – dabbing the paint gives a solid fire engine red, while rubbing it in yields anything from a desaturated red to a neutral to a green. Really cool.