Dakota Headlights
When your headlamps were new, they had a UV protectant applied to them, much
like the clearcoat over the color coat on modern paint. The plastic is polycarbonate,
(common trade name Lexan),which is extremely impact resistant(this is what bullet
-proof glass is made of), but it is not very scratch or UV resistant. Once the coating
has failed,you can see what looks like a poor paint "blend line" from a repair that
develops between the clear & hazy portions.
That is why sanding and polishing doesn't last now. Meguires makes a kit w/a
protectant, but it has to be applied out of the sun w/the lens cool,and it has to be
allowed to cure before using the lamp or exposing it to moisture. Otherwise it will
"blush" just like clearcoat exposed to moisture B4 it has cured.
There are a number of "import" offerings thru yards etc.,like Eagle eye and Depot
to name a couple.I have installed them for cust.'s w/OK results,sometimes the focus
or clarity doesn't match the OE performance. But it's better than driving w/the equal
of two hand-held incandescent flashlites !! Then install Sylvania extravisions,not the
brightest,but last a bunch longer than silverstars esp. if your stuck w/DRL.