||Assuming these are exactly the same as an OEM plastic lens, I know they will discolor after a few years. Of course they can typically be polished out, as I have done on various cars.
The Z glass lenses definitly hold up better as far as discoloration and hazing, but of course are subject to scratches and chips, which are much more difficult to polish out if they occur.
Don't get me wrong...I am excited to see the outcome of these lenses, but this is a consideration.
Is the "POLAR" logo visible when installed?