There are plenty of all original bikes and plenty of 100 point restorations. And everything inbetween.

Enough to satisfy whatever floats your boat.

But I would call the product in the op as a form of restoration. While you had nature play a hand in creating the finish, spraying clear is no different than spraying a color. As a matter of fact, I have seen cars with a faux patina. Just another in the endless aesthetic choices one can make.