I do it ...and I'm finally successful at it. I had to peek into the 'naturals only' thread to figure it out. There's something called the 'conditioner only' method, in which they leave conditioner in their hair after a cowash. not doing too much manipulation helps define the pattern better. That's what i did and it turned out nice.
I'm pretty bone straight so the only pattern i get is when i scrunch. but it works. i'm 4ab too. The thing is...you NEED a prodcut to hold the scrunch pattern. and that's where gel, conditioner gel, or conditioner only comes into play.
I've had success using:
ecostyler gel,
qhemet's detangling gel,
light weight conditioner