On 10/23/2020 12:13 AM, micky wrote:
I was looking for a good product to restore the clarity to my headlight
lenses, and the Sylvania 3-step kit said, "This UV Block Clear coat is a
specially formulated polymer coating with active and passive UV
blockers"

I understand passive UV blockers, but what are active. Do they run up
to the sun and keep it from sending out UV?

I can't copy the url because it's on the other computer.

Anyone happy with what they used for headlight lenses?


Off hand, I might think the active blockers deflect UV and the passive
are antioxidants that prevent the damage.

Keeping cars in garage I have never had to polish a lens. In my mind a
good kit would be polish to restore surface, coating to protect against
UV and materials in the coating to add abrasion resistance.

Such materials exist and what surprises me are the expensive cars with
cheap dulled lenses.