Until I saw your last picture I was going to say that a couple of light strokes with a cylinder hone is the best way for me to read a cylinder wall............but unfortunately that bore doesn't look salvageable with pits that deep.
One suggestion on scotchbrite - I never use it on internal engine surfaces unless it can be thoroughly flushed. It leaves way too much easily embedded abrasive residue.
The surface is very uneven below the water line, and the water line(s) are deeper and pitted. It’s worse than it looks, when you touch it. I don’t want to use it anymore since repairing it will cost more than finding one that isn’t toasted.