These are the damage levels for Duration according to epedia. When your mirror reaches "The surface of the mirror is uneven and scuffed.", is that the point of no return when trying to cap a set?

The surface of the mirror is flat and polished.
The surface of the mirror is flat and unscratched.
The surface of the mirror is flat.
The surface of the mirror is flat but slightly scuffed.
The surface of the mirror is slightly uneven and scuffed.
The surface of the mirror is uneven and scuffed.