Guys everyone is against me so tell me oden has coc so why does he get shocked when he saw roger and whitebeard fight without touching thier weapons???? Because oden infused his swords with coc zoro and oden both doesn't know concept of coating weapons with coc
Plus, ts not like he ever meet anyone else who could coat his weapon with CoC before meeting WB and Roger, much less witness a clash. He just didn split the sky with Kaido because he neg diffed Kaido, poor snakeboi got boddied soo fast he didnt even had time to clash weapons with Oden.
As for Zoro, its confirmed he is doing it as we can clearly see lightning from his weapons now. My guess is that asura has always been a minnor version of CoC haki coating.