Waaaaiiiittt... you did that without us? Well, you started with us. That's the important thing.
What you have there is some fine-looking dope in late-stage flowering. It is not uncommon for plants to look beat up and deficient/burned when they are about to get harvested. The plant is putting its energy into making the flowers, not the leaves. Those leaves are probably brittle and easy to break? Maybe dry? Point is, don't worry about it. Even if previous grows looked 'better.'
No idea about flushing. I don't.