Car headlight lens polishing kit, $20

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Dec 21, 2007
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Ft Riley, NE Kansas
I've seen enough before/after advertisements to be skeptical, but I must say I am pleased with the results of the 3M kit my wife bugged me to get.

http://www.superiorcarcare.net/3m-headlight-kit.html

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It requires a cordless drill, and the kit includes the foam-backed rotary sanding/polishing bit that attaches the various polishing discs with velcro. I got a radio, 6-pack of beer, hand sponge, and a 5-gallon bucket filled to the brim with water...and a short seat. I'd allow 15 minutes per lens.

Tape around the headlight to cover the body paint (enough tape is included to do two cars). No matter how hard you try, you will remove some paint if you don't do this.

Its a 4-stage process, and don't freak out on the first stage...its where you actually sand off the top layer of plastic, so it will look worse before it looks better. I angled the drill slightly and used the trailing edge to touch the lens as I went back and forth. It took me 4 passes to cover the whole lens once, and after every two passes, I dipped the disc in water to keep everything wet. Move slowly across the lens with very light pressure, but...always be moving, don't sand in one place too long.

After covering the entire lens about 3 times (your lens may be worse than mine, 3 did it for me) you can tell this stage is done when the yellowing is gone, and the fine scratches you are leaving on the lens are all evenly spread out in a easy-to-see pattern, it will look frosty. The plastic you are removing will form a white sludge, wipe it off occasionally with the sponge and water, so you can see the evolving results.

The next stage is a very fine sandpaper that is noticably finer than the first, and you can tell when that stage is done when the pattern of fine scratches looks like the newer and smaller scratches, and the bigger scratch pattern is gone.

Third stage, repeat with the finest sandpaper discs, keep everything wet throughout the entire process of every stage...

Final stage is a round sponge disc, and you apply the "rubbing compound" to it (provided in a foil packet), repeat pattern until it stops getting clearer. There are enough supplies included to do two cars (minus bucket, seat, beer, radio, cordless drill etc).

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I recently used a similar kit that had successive sandpaper grits to something in excess of 2000. It was a little cheaper, I think about $15, but didn't include wrapping up with a drill. Just had some soft cloth to use with the final polish.

Also worked great. I wouldn't have thought of using sandpaper on plastic lenses, but those grits are much finer than the ones I normally use.
 
Used one of the drill bit kits on a e430 mercedes 2002, but I had mediocre results. Also, you loose whatever UV protection coating it originally had, so it's worse considering applying one.

But I will give it another shot (the kit came with two headlights worth, and I only have 1 problematic headlight). Your results are encouraging.
 
Kin said:
Used one of the drill bit kits on a e430 mercedes 2002, but I had mediocre results. Also, you loose whatever UV protection coating it originally had, so it's worse considering applying one.

But I will give it another shot (the kit came with two headlights worth, and I only have 1 problematic headlight). Your results are encouraging.


After you clean them up real good, look on ebay for precut clear headlight protection films. They are UV stable and will prevent this type of damage in the first place.

3M Clear Bra material is the best. OR find a local shop that will install it. Not expensive and worth it, especially with plastic lenses.
 
Wipe on, wipe off, see thru what you couldn't see thru a moment ago. Works not just on headlights but on the plastic over the speedometer of fairly new Chinese scooters that have sat outside ever since they broke down at 700 miles, plastic safety glasses, etc.

Got it at Pep Boys.

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