The fact is there was no such thing that you are talking about when Zoro or Oden cut Kaidou, as simple as that.
It was though... that's the entire narrative behind RT that CoA was shallow & CoC cuts/hits deep enough to wound Kaidou - shown with both Luffy & Scabbards.
The entire purpose of Kaidou mocking the Scabbards attempt and telling them they are powerless to even reopen the scar and praising Zoro's CoC after taking a full on attack from him, which coincidentally leaves a scar, is literally to highlight that.
The Kaidou sequence happened as you said, when he gave everything he had and Enma accidentally pulled CoC out.
Heavily disagree about the King sequence though.
He was basically feeding CoA to Enma to satiate it and further decided to give it CoC.
Made a thread about it a long time ago with panels, explanations and stuff, we can discuss there if you want: https://worstgen.alwaysdata.net/for...-requirements-and-what-is-king-of-hell.21792/
It was though... that's the entire narrative behind RT that CoA was shallow & CoC cuts/hits deep enough to wound Kaidou - shown with both Luffy & Scabbards.
The entire purpose of Kaidou mocking the Scabbards attempt and telling them they are powerless to even reopen the scar and praising Zoro's CoC after taking a full on attack from him, which coincidentally leaves a scar, is literally to highlight that.
The Kaidou sequence happened as you said, when he gave everything he had and Enma accidentally pulled CoC out.
Heavily disagree about the King sequence though.
He was basically feeding CoA to Enma to satiate it and further decided to give it CoC.
Made a thread about it a long time ago with panels, explanations and stuff, we can discuss there if you want: https://worstgen.alwaysdata.net/for...-requirements-and-what-is-king-of-hell.21792/
You don't need to coat CoC to be using it. He was unconsciously using normal CoC, but there is no black lighting, or coating or anything like that to suggest otherwise.
Look at your third point. You just said "Enma" accidentally pulled CoC out. I thought it was all Zoro? The thing about Haki is that panels are never enough to show all that's happening, whereas Enma is stated to have the ability to let Ryou flow out of the user.