To tell you the truth, you can just rebond your fringe.
And further more its cheaper and faster than when you do full head.
There's allot of people who are bothered by curls on the fringe rite!
It depends on how strong the curls are, but if you rebond fully, you can just rebond the fringe next month when you go for treatment next month. Do not get tricked by the salon's marketing scheme. O.O
And when only permanent straightening the fringe, you'd wouldn't need to rebond often and worry about damaging the whole hair to keep it straight.
Full head permanent straightening >Treatment >Fringe rebonding + Treatment >Full head rebonding
I recommend this cycle. HAI :D
Hair styles with these fringes might be bothersome when the curls are coming out. Keeping it short will bother having the curls coming from the roots. There's a best length for fringe that is subtle, which is not too short and not too long.
having it too short looks un-organised and too long makes it in the way. so i would recommend trimming the fringe often.
But for customers who can't come often for fringe trim, I recommend longer fringe and parting side ways.