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Old 24-11-2017, 07:06 PM   #1
victor95
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Wet sanded headlights..

So I wet sanded my Astra H headlights which have 127k miles on them.

Used the 400 grade wet and dry and sanded to the point they went cloudy.

Proceeded to DA with a white pad and Menz 2500. I’m gettin a clear finish but there’s still a lot of fine sanding marks. Tried refining with a orange pad and menz 3000.

Done a couple passes and even re sanded but still can’t get rid of them all in the light.

Any pointers?

Thanks
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Old 24-11-2017, 07:13 PM   #2
Andy from Sandy
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If you went at the headlamps with 400 then I would say that needs refining with 800 then 1200 then 2500 then get the polish and DA out.

400 is very course and the different grades of paper I suggest will take care of the coarseness of the previous grade.
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Old 24-11-2017, 07:34 PM   #3
91davidw
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Little guide I wrote about restoring headlights.

http://www.detailingworld.co.uk/foru...d.php?t=400422

Think you'll have to resand the headlights with 2500 or 3000 wet and dry before machining to remove the 400 sanding marks.

Cheers
David
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Old 24-11-2017, 08:13 PM   #4
Slammedorion
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Try some 800 - 2000 before the 3000

2500-3000 won’t be touching the 400 sanding marks
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Old 24-11-2017, 08:30 PM   #5
chongo
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Quote:
Originally Posted by victor95 View Post
So I wet sanded my Astra H headlights which have 127k miles on them.

Used the 400 grade wet and dry and sanded to the point they went cloudy.

Proceeded to DA with a white pad and Menz 2500. I’m gettin a clear finish but there’s still a lot of fine sanding marks. Tried refining with a orange pad and menz 3000.

Done a couple passes and even re sanded but still can’t get rid of them all in the light.

Any pointers?

Thanks
Did you do any research before you tackled them with 400 grade bud.
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Old 24-11-2017, 09:46 PM   #6
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Thanks for all you helpful replies. Will do as you all say and report back over the weekend.

Chongo - i did quickly but admittedly I saw 400 grade and cracked on impatiently. I Just missed the step of refining it seems but that’s easy enough to resolve.
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Old 24-11-2017, 09:47 PM   #7
victor95
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Great guide 91davidw
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Old 26-11-2017, 02:56 PM   #8
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So I went through the grades 800, 1200, 2500 and polished with Menz 3000 but I still have a lot of faint sanding marks. Whereas before I only had the odd few.

I resanded with the 2500 grit a re polished but I can’t shift them.

Hopefully pics show what I mean. From a distance the look clear n shiny but up close they not.

Obviously I’m either not sanded enough or not polishing enough but whatever I try doesn’t seem to improve.

Cheers
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Old 26-11-2017, 03:06 PM   #9
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Is there any particular reason why your using Menz 3500??
After sanding i normally like to use a more aggressive polish/compound and then refine further with a finishing polish

So maybe the 2500 just aren't being polished out
Have you got anything more aggressive to use and then refine after?
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Old 26-11-2017, 06:50 PM   #10
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Those marks will be the remains of your 400 grit attack and won’t budge until you repeat the whole sequence working your way up the papers from 800 again. Just keep working at them, they will budge eventually.
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