Originally Posted by Inga
When I have had horses with rebellious manes I would band them to train the hair over. Like this http://doublestitched.net/images/m-t9.jpg
Pulling the underside of the banded hair slightly tighter then the top to not pull the hair out and to keep it from moving to the other side. I did this for weeks and it always worked. Also taking a damp brush daily to smooth the top hairs to the correct side.
yup, when I first got my mare she had been basically "wild" in a field, so her mane was pretty wild as well
I pulled it, washed it, banded it, then repeat as necessary. It generally stays on the right now, occasionally looking like a mohawk. When I have her blanketed in winter with her full neck it does tend to flip a bit at the withers and closest to her bridle path but that's always a quick fix comes spring.