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#4494636 - 08/21/17 05:27 PM Sanding foggy lights....blemish marks remain
Mr_Accord Offline


Registered: 01/24/07
Posts: 446
Loc: LBP
I'm currently in the process of restoring a set of pitted & fogged up lights I pulled off a parts car. Ive come across a weird blemish in the lens that is apparent on both lights. I'm not sure if this is on the outside or inside of the lens. If on the outside could it be my sanding technique? or possibly just a heat wear mark from the bulb on the inside of the lens over time? I usually start off with a 600/800grit depending on bad they are, and then move on to wet sanding with 1000grit, then 2000 in a crisscross pattern followed by M105/205 using a DA w/cutting pad.

IMAGES HERE


Edited by Mr_Accord (08/21/17 05:28 PM)
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#4494649 - 08/21/17 05:39 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
Warstud Offline


Registered: 09/02/05
Posts: 5198
Loc: MIchigan
About all you can do is Clear Coat it and hope it disappears.

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#4494681 - 08/21/17 06:20 PM Re: Sanding foggy lights....blemish marks remain [Re: Warstud]
Mr_Accord Offline


Registered: 01/24/07
Posts: 446
Loc: LBP
the second pic is after clear coating then polishing. Still remains.
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#4494720 - 08/21/17 07:12 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
Rand Offline


Registered: 08/20/03
Posts: 12493
Loc: NE,Ohio
looks like a stain on the inside?.. kinda odd.
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#4494725 - 08/21/17 07:23 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
JeepWJ19 Offline


Registered: 09/09/15
Posts: 899
Loc: PENNSYLVANIA
Yes definitely seems odd. We did the sanding technique on dad's fogged up lights. Last 4 years before fogging again.

It was too much work vs buying new lights.
Water sanded them using same steps you did.
Then buffed the headlights
Then applied 3M clear coat to them

Never again.
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#4494785 - 08/21/17 08:28 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
SubieRubyRoo Offline


Registered: 05/14/12
Posts: 878
Loc: Winchester, Indiana
I bought the Mother's power ball kit to use on my 01 Forester and 06 Odyssey. I had the same thing on mine; it took more sanding with the lowest grit paper disc until all of that roughness was gone. It took a long time but it finally all came out.

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#4494862 - 08/21/17 10:09 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
Reddy45 Offline


Registered: 08/15/08
Posts: 2745
Loc: USA
Looks like a heat mark to me.

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#4494865 - 08/21/17 10:14 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
dblshock Offline


Registered: 04/24/07
Posts: 2592
Loc: WI.
YouTube has a guy doing it with Mothers aluminum polish and a buffer..looks pretty good but if your after perfect maybe cheaper to just replace.
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#4494879 - 08/21/17 11:03 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
FastEddie Offline


Registered: 06/15/08
Posts: 379
Loc: The 805, CA.
Those headlights are pretty jacked up. If sanding by hand, keep sanding. This is why I always use a machine when sanding headlights. They can take a long time to fix, and many times will never come perfectly clear.
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#4494889 - 08/21/17 11:21 PM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
03cvpi Offline


Registered: 03/04/07
Posts: 198
Loc: Minneapolis
Looks like one of the lamps exploded. I've seen that on a few cars, we just empty out the pieces and maybe wash out the inside of the housing, left dry and put back in service.

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#4496514 - 08/23/17 09:49 PM Re: Sanding foggy lights....blemish marks remain [Re: FastEddie]
Mr_Accord Offline


Registered: 01/24/07
Posts: 446
Loc: LBP
Originally Posted By: FastEddie
Those headlights are pretty jacked up. If sanding by hand, keep sanding. This is why I always use a machine when sanding headlights. They can take a long time to fix, and many times will never come perfectly clear.


What type of machine are you using? Polisher with a hook and loop sanding pad?


Edited by Mr_Accord (08/23/17 09:51 PM)
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1990 VW Jetta GL 1.8L 8V - SOLD
1992 Honda Accord Lx - SOLD frown
1993 Ford Aerostar XL 4L V6 - Retired RIP
2004 SAAB 9-3 ARC 2.0T - Current

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#4496515 - 08/23/17 09:50 PM Re: Sanding foggy lights....blemish marks remain [Re: 03cvpi]
Mr_Accord Offline


Registered: 01/24/07
Posts: 446
Loc: LBP
Originally Posted By: 03cvpi
Looks like one of the lamps exploded. I've seen that on a few cars, we just empty out the pieces and maybe wash out the inside of the housing, left dry and put back in service.
Yeah I think the inside is a heat mark after looking it over further. Unfortunately I can't access the inside enough to clean it out.
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1990 VW Jetta GL 1.8L 8V - SOLD
1992 Honda Accord Lx - SOLD frown
1993 Ford Aerostar XL 4L V6 - Retired RIP
2004 SAAB 9-3 ARC 2.0T - Current

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#4497667 - 08/25/17 10:51 AM Re: Sanding foggy lights....blemish marks remain [Re: Mr_Accord]
Cujet Offline


Registered: 02/15/03
Posts: 6976
Loc: Jupiter, Florida
The only way I ever get good results is to sand the hard coating off, and well into the soft plastic. With the ever finer paper method mentioned above.

Then buffing with a Blue Point/Snap on 3 inch detail buffer and Flitz. Coat with wax afterwards. I don't clear coat them, as my last clear coat attempt eventually had degradation under the clear, that needed to be sanded and buffed.
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