In the pic that Brak's posted above, you'll notice that the blonde repeats every few inches, then stops. I can't figure out how they did that with "standard" braiding techniques, UNLESS what they did was use REAL brunette human (or horse, etc.) hair, and then bleach it every few inches to create the blond look. You can see in each blonde section, that there are a few black hairs here and there. I don't know if this is the result of sloppy braiding, or the result of some of the brunette hair not getting enough bleach on it... :confused
I haven't tried bleaching synthetic hair... YET. Hair bleach may not work on it, but something else (that you wouldn't dare put on REAL hair) might do the trick...
I'll experiment and let you know.
