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Comes with a hockey-puck size wheel of dense felt and a pouch of powdered cerium oxide glass polishing compound. You are to mix a little of the compound with water, keep felt wheel and everything moist, and chuck wheel into a 1/4" drill and grind away.
This is, if your milkiness is from pitted outside surface from sandblasting thru the years.
I have tried it and it doesn't really work. You get better results with an air die grinder or a Zip tool (router speeds instead of drill speeds) but it can get too hot locally. If the felt wheel isn't chucked in all the way it will start getting out of balance and bend its own shaft and come apart dangerously.
Plus it spatters the polish everywhere and it clings hard to paint so cover everything with plastic, taped down, if you try this on a car.
I have on the shelf a project on a pitting-destroyed pair of headlight lenses: I used ever-finer wet-or-dry sandpaper to block sand the glass till I could only see a few pits. But it's now nearly opaque and I decided I need to make wooden frames to hold the lenses face up in the bottom of a utility sink before I go further trying to use the polish to bring the glass back to clear.
I think you can still buy the glass parts of these headlamps by themselves, then find a way to unglue the plastic backs and re-glue them.
If it's haziness on the interior of the lights there's a recommendation on here, I think it was isopropyl alcohol as a cleaner, swished around, then rinse with distilled water. Or maybe it was something stronger. Use search and you might find it.
I doubt toothpaste would do much. Also, I think the two-part kit is for plastic headlight lenses and our cars don't have those. (In my experience those are only helped a little bit. They're not of a type of plastic that takes to polishing. Only answer to dulled yellowed plastic headlights is to buy new ones.)
posted by 71.241.19...
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