I am not sure about imposing his CoC because right now Zoro is feeding Enma with his own CoC which could result in a coating coc blade. Wanna wait for panels first.
If Zoro is pumping Enma with CoC then it's most likely because Enma is sucking it, not because he's actively coating it. Just like how he didnt realize Asura had CoC when he scarred Kaido