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Old 03-15-2020, 01:32 PM   #1
chrs1961815
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Default Headlight Lense Restoration

How do you restore original glass lenses?
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Old 03-15-2020, 02:05 PM   #2
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Default Re: Headlight Lense Restoration

Use your favorite rust remover snake oil followed by a stiff scrub brush and detergent.

Extremely fine scratches and mars can be polished out with cerium oxide, glycerin and a rock hard hard felt pad. As with any polishing some skill is required to produce the desired result. If you've never polished out glass practice on a scrap headlamp lens first!
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Old 03-15-2020, 03:02 PM   #3
BRENT in 10-uh-C
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Default Re: Headlight Lense Restoration

Toothpaste is another good way to polish the glass.
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Old 03-15-2020, 07:16 PM   #4
Ray in La Mesa
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Default Re: Headlight Lense Restoration

I've used a soft wire wheel to clean rust & other stuff off of glass, works great just don't press hard & keep moving so you don't build up heat. it doesn't do polishing though.
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Old 03-15-2020, 08:21 PM   #5
Don Turley
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Default Re: Headlight Lense Restoration

To clean them, I've soaked them in full strength (not diluted) laundry bleach for a few days. It removed all stains, including rust, leaving them crystal clear. I've never tried to polish out scratches.
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Old 03-15-2020, 09:48 PM   #6
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Default Re: Headlight Lense Restoration

A bit more information on my polishing with cerium oxide comment-. That stuff actually CUTS glass, much like a buffing compound works on metal or paint. That's why I said practice on a scrap lens. Lapisists use the stuff for polishing grinding marks out of many types of cabochons, especially opals. Glass engravers use it to polish flutes and cut rims after aggressive diamond cut down. It is also used to restore windshields with fine hazing from wipers grinding road grit across the glass.

Toothpaste, diatomaceous earth, even pumice can be run aggressively against a glass lens and will remove stubborn surface deposits, including calcium haze and iron rust stains, but will not actually cut down the glass to reach the bottom of fine scratches. They may leave it looking shiny, but will never actually remove scratches.

Google "cerium oxide glass polishing" and you will find a myriad of stuff, some good, some hype and also some YouTube how-to's that are just wrong! I've use it for years to restore antique scratched glass mirrors and windows of all kinds.




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Old 03-16-2020, 06:31 AM   #7
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Default Re: Headlight Lense Restoration

Thanks for all of the advice. I used some softscrub and they look as clear as a reproduction lense. Now I have a few scratches to deal with next.
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