I use aileron to correct for wing rock and steer with rudder, maybe not the best way but it works for me. At first you will be chasing the wings but with time the wing rock magically goes away. If the wings get really "out of shape" I'll correct with aileron and rudder together. Some planes love spoilerons some don't care either way. I always thought rocking was a yaw problem since the rudder's airflow is blocked by the elevator, that's why inverted harriers are easy ( the rudder is in clean air). Honestly, I have no idea