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  #1  
Old 25th April 2019, 05:50 PM
sean sherry sean sherry is offline
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Question Glass polishing

Low sun shows up all the sand blast marks on the screen.
Is it possible to have them polished out ? Claying just cleans out the ingrained dirt. A new screen would be nice, but i think insurance would not cover this unless the screen was cracked ???
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Old 25th April 2019, 06:31 PM
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Default Re: Glass polishing

Sean,

Iíve never seen a sandblasted screen restored.

Tell the insurance company it is unsafe when driving into the sun.

But check your insurance policy, as a lot have a free windscreen bonus over a certain number of years or so.
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Old 25th April 2019, 06:57 PM
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Default Re: Glass polishing

Hammers are cheaper than windscreens, on the off chance that is relevant.
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  #4  
Old 25th April 2019, 09:36 PM
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Old 25th April 2019, 11:34 PM
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Default Re: Glass polishing

AutoGlym do make a great polish I have used the polish on all of the glass for the 300SE and the C220.

The C220 windscreen does have stone chips and it is the original screen.

I will have to replace the screen best to ring around and get quotes.
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Old 26th April 2019, 05:40 PM
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Default Re: Glass polishing

Quote:
Originally Posted by sean sherry View Post
Low sun shows up all the sand blast marks on the screen.
Is it possible to have them polished out ? Claying just cleans out the ingrained dirt. A new screen would be nice, but i think insurance would not cover this unless the screen was cracked ???
If you decide against a new screen have a chat to Ralph Moore. I had a side window polished to remove a very deep scratch and the job was a great success. A few years ago Porsche used to do it as part of their basic service but I suspect they have dropped that now.
Regards,
Brian
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Old 26th April 2019, 07:44 PM
sean sherry sean sherry is offline
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Question Re: Glass polishing

Bit the bullet and and used mild paint cutting compound and polished it off with a glass cleaner. Screen now very clean, and the sand Blast pock marks now not very noticable. I can live with that .

Next job is to spruce up the Alloys. Usual kerb damage under the plastic rim protectors. They are stuck on and not very successful.
At $150 per Rim I will attempt a home repair. I have the tools to do the job.
All advice gratefully received.
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Old 26th April 2019, 08:24 PM
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Default Re: Glass polishing

I have just watched a YOUTUBE video on this its called - REMOVE BAD SCRATCHES IN GLASS...FOREVER!!! the poster is Sweet Project Cars, he has quite a few interesting videos. Hopefully the link works, if not just search you tube for the video or poster. Regards Maurie.
https://youtu.be/k1B_puVXtxk
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  #9  
Old 26th April 2019, 08:41 PM
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Default Re: Glass polishing

Gents,

I have seen scratches removed and some quite bad ones at that, but Seanís original post talks about a sand blasted windscreen, quite a bit different than a localised scratch.
Thus my comment Iíve never seen a sand blasted screen restored.

But of course someone may have gone to the trouble and done it to an irreplaceable screen?
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  #10  
Old 26th April 2019, 09:56 PM
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Default Re: Glass polishing

Can be done commercially with a water cooled 4 inch disc polisher, using 20,000 to 50,000 grade tin oxide (white), or Cerium oxide (brick red). Both oxides have a Mohs hardness of around 8.5; windscreen glass is around Mohs 7.0.
Gem facetors (I happen to be a gem cutter), use these oxides for polishing the facets on cut stones, so I am familiar with the polishing powders that are used , and the grades used. I have cut and polished about 80 faceted gemstones.

There are specialists out there, who make a living out of polishing the wiper score marks from automotive windscreens.

I have successfully removed wiper score marks from the windscreen of my 6.9, using hand rubbing, but it is an awfully slow and relatively messy process. An electric 4 inch polisher is OK for this process, but it must be water cooled, or the windscreen will crack due to localized overheating. I used 20,000 grade cerium oxide; 1/2 kilo bought from Naxos Chemicals.
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Old 29th April 2019, 05:51 PM
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Default Re: Glass polishing

Quote:
Originally Posted by abl567 View Post
Hammers are cheaper than windscreens, on the off chance that is relevant.
.......yeah, but who cleans up the mess ? regards Styria
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  #12  
Old 30th April 2019, 09:13 PM
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Default Re: Glass polishing

Click punches are about as cheap as hammers........
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