It can build up and block all light from leaving the lens. It is semi-smooth to the touch.
[header] How to instantly remove oxidation from headlight without sandpaper [title] If we take this from a scientific approach we must look at the problem as a doctor would when he diagnosed a problem. [step] Is the problem oxidation? Or is it something else? [title] Understand oxidation. [step] Oxidation is a flat opaque covering that lays evenly on the surface of the lens, it will start out white turn yellow and eventually brown.