You will have white chickens for SEVERAL generations.
X2 crossing the pullets back to their father would help produce some CL looking chicks, but you would have to fight those white genes and whatever they're covering for a long time! Autosexing should not be lost, even in the F1 generation.
Experiments are funny though. I crossed my CL roo to some white silkies and ended up with cream crele birds with muffs, black legs, 5 toes, and red walnut combs, and attitude!