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Old 10-25-2002, 09:25 PM
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Post Removing grinding debris from glass

In a big novice move, when replacing floorpans in my 69 Camaro, I did not cover the windows when grinding. Now my back and both rear windows have small pieces of metal embedded in them. I have gotten some out with my fingernail, but I was wondering if anyone has a better idea on how to get them out.

Thanks.

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Old 10-25-2002, 09:33 PM
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This happened to fellow tech. some time ago. the only way we found was to clean the windows first with glass cleaner, then spray more cleaner on them and GENTLY scrape over them with a razor blade. Pitts will still show up.
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Old 10-25-2002, 09:38 PM
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There are special glass buffing compounds and pads you can buy and use to remove the pits, just as tlambert says use cleaner and razor blades to remove the metal gently. If you can't find the glass suplies let me know through PM, I could probably locate some for you.

HK
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Old 10-26-2002, 06:43 AM
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Go to the grocery store and get a can of Barkeepers Friend. You can use this to clean the windshield. If you use a razor blade make sure you have quite a few because if you nick the blade you can do some real damage to the windshield in the way of scratches. Barkeepers Friend is a real fine abrasive that is safe for glass and removes all residue without scratching. Use a soft rag when using it. Never use a plastic kitchen scratcher or anything like that because they will scratch. It will be time consuming but you can get it done.

Kevin
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Old 10-26-2002, 05:09 PM
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I did the same thing on my Willys. Unfortunately, the hot metal melts into the glass so you can scrape off the grit but it takes little chunks of glass with it so you will always see the pitts. My windows look like they are covered with tiny diamonds when the sun hits them just right! Only fix is to replace the glass. Another rodding lesson learned the hard way! Actually is there any other way to hot rod?
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Old 10-26-2002, 08:56 PM
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had the same thing happen to the shop truck, apprentice didn't cover the glass. i tried all the common compounds and even cerium oxide but the bits are imbedded (burned) into the glass, had to replace the windshield.
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Old 10-28-2002, 11:45 AM
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i had this same problem at work all i did was get a sharpe flat blade and skrape it of trhen got the preasure washer on it with some soap and as good as new
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Old 10-28-2002, 01:02 PM
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Well looks like I have learned something today. Never thought about this happening. HK Eastwoods sells a windshield buffing kit. Guess Ill wait til very last in but my glass back in!

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Old 10-28-2002, 01:21 PM
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if you scrape the glass with any metal scraper or bondo spreadder, be sure to apply force parallel to the window will reduce the risk of scratching the glass. and do it in fast strokes and the metal particles will come right off. well so will some the glass. but at least the pits wont rust.. :-)
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Old 10-28-2002, 08:34 PM
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Thanks for all the info folks!
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Old 10-28-2002, 11:32 PM
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I worked in an automotive glass manufacturing plant for about 6 years...we made glass for about 30% of the cars that you see sitting in dealerships. Anyways, here is a good rule of 'thumb' - If you can feel it with your fingernail...its there forever.
We used Rare Earth which is a nature pumice powder and mixed it with windshield washer fluid until it was the consistence of pudding. Then we used a felt buffing block to polish out scratches.
Later,
Weimer
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Old 10-29-2002, 01:14 AM
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Replace the glass, you'll never get the big pieces and the pits will never polish out. You can use jewellers rouge to temporarily fill them but every time you wash the car you'll have to do it over again.

Sorry.
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Old 10-29-2002, 06:57 AM
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[ October 29, 2002: Message edited by: krankenstein ]</p>
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Old 10-30-2002, 01:19 PM
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the glass wont come off it will take a lot 2 scrap away glass
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Old 11-16-2002, 10:11 PM
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haha, gotta few of those pits in my back glass to last summer. ditto on the lesson learned the hard way post. right up there with sanding too close to new chrome door handles w/o removing them etc etc.
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