Cylinder bore is scratched up!

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.