Scratched Glass

Mr.Ian · 16th October 2007, 20:52

Hi, i'm just wondering if anyone else has this problem.
Front door windows are being scratched when wound up or down on the outside and the scratches are now easy to notice.
I've prized the outer window to door seal away from the glass and given it a good clean to get rid of any sand or muck that is stuck but a scratching noise can still be heard.
This is only a problem with the front door windows, the rears are fine and scratch free.
I don't open my windows anymore and am not going to till I sort the problem.

Anyone had this on their 75

GreyGhost · 16th October 2007, 20:56

Must still be some grit inside the rubber.

When you get it sorted you should be able to cut the scratches off the glass using jewellers rouge.

Best of luck

Mr.Ian · 16th October 2007, 21:02

Thanks GG you've made my day, thought i'd have to change the door windows to get rid of the scratches.
Only slight scratches anyway but scratched all the same.
I'll try n give the seals a good thorough cleaning, I was just wondering if it was one of our common little problems we have with these cars (only had it 7 months).

Ian

Pete · 16th October 2007, 21:05

I've never heard of scratched glass myself and not experienced it on mine either - unlike my MGB GT on which this is a very common problem. If you find out what has caused it then it will be interesting to hear more.

GreyGhost · 16th October 2007, 21:08

The rubber seals are pretty tight I can only imagine something got in while the window was open and has been worked further in with use of the window, could just be a grain of sand or something even smaller

SteveWaller · 16th October 2007, 21:19

Mine has the same problem on the drivers side. The rubber seal was filthy and grit embedded in them had scratched the glass. I have cleaned the rubbers, but the scratched glass is still a problem. What would people suggest I use to try and polish the scratches out and where would I get such a product? By the way, giving the rubbers a good soaking in silicone lubricant helped a lot.

GreyGhost · 16th October 2007, 21:24

This is the best product for the job, not necessarily from this company. Do search for Jewellers Rouge on Google for more info.

http://www.briliant.biz/products.asp?CategoryId=7

Lates · 16th October 2007, 21:52

Be a little careful with jewellers rouge as it can marr the surface take it slowly. Joking apart fine scratches can be polished out with toothpaste - and no it doesnt matter if its whitening.

Jules · 16th October 2007, 23:16

I didn't have much success removing very light arc scratches on an MG TF windscreen, with a proper glass polishing kit from CETEM.

#

Must have spent 5 hrs machine polishing just 2 inches of the arc!with various grades in the kit, with very little effect. The scratches were so light your finger nail would not catch accross them!

I did not want to beaten, but I'm afaid I was and had to sell the TF as it was.

Isn't it strange there are no proffessional companies offering a mobile glass scratch removal service like they do with scratches and dents on paintwork?

I rang Autoglass and various local independent Windscreen repairers and they all said "it's not viable mate"

If you Google glass scratch repair, loads of companies claim their products will do it!
Wonder how true it is.

Has anyone been successful with the toothpaste trick?

T-Cut · 17th October 2007, 20:22

In order to remove scratches by abrading away the glass, the abrasive has to be harder than the glass or it will not be touched. Toothpaste sounds like a non-starter to me. Maybe OK for paintwork, but not glass. I've not polished a windscreen before, but I have created parabolic mirrors by grinding and polishing glass discs and the standard abrasive used is carborundum powder (silicon carbide). You can get these powders in different grades from coarse to very fine. They use the same BS numbering system as wet and dry abrasive papers. The finest carborundum (say 800 grade) would easily take out very fine scratches, but would leave the area 'fogged'. This fogged area would then have to be polished using a finer abrasive paste like jeweller's rouge or cerium oxide. Both are as fine as flour, but extremly effective. The principle behind abrading and polishing glass is the abrasive should be coarser than the 'fault' you're trying to remove, or it will take much effort to remove it. That's why a series of abrasives, getting progressively finer, is used for mirrors. Each one removes the scratches produced by the previous one. I think to polish a windscreen, you'd need at least two abrasives if it isn't to take weeks to do the job. I suspect nobody does this commercially because of the effort involved. Once you've done one windscreen, you won't fancy doing another.
TC

16th October 2007, 20:52	#1
Mr.Ian Avid contributor Rover 75 Tourer Join Date: Mar 2007 Location: Lancashire Posts: 126 Thanks: 0 Thanked 0 Times in 0 Posts	Scratched Glass Hi, i'm just wondering if anyone else has this problem. Front door windows are being scratched when wound up or down on the outside and the scratches are now easy to notice. I've prized the outer window to door seal away from the glass and given it a good clean to get rid of any sand or muck that is stuck but a scratching noise can still be heard. This is only a problem with the front door windows, the rears are fine and scratch free. I don't open my windows anymore and am not going to till I sort the problem. Anyone had this on their 75

16th October 2007, 21:05	#4
Pete Owners Club Director Rover 75 Join Date: Oct 2006 Location: Sherfield-on-Loddon Posts: 4,874 Thanks: 137 Thanked 996 Times in 444 Posts	I've never heard of scratched glass myself and not experienced it on mine either - unlike my MGB GT on which this is a very common problem. If you find out what has caused it then it will be interesting to hear more. __________________ Follow The Club On Twitter

16th October 2007, 23:16	#9
Jules This is my second home ZT 260 SE Twilight and 10 other 75 ZT's :O Join Date: Jan 2007 Location: Conwy NORTH WALES Posts: 11,094 Thanks: 512 Thanked 1,116 Times in 763 Posts	I didn't have much success removing very light arc scratches on an MG TF windscreen, with a proper glass polishing kit from CETEM. # Must have spent 5 hrs machine polishing just 2 inches of the arc!with various grades in the kit, with very little effect. The scratches were so light your finger nail would not catch accross them! I did not want to beaten, but I'm afaid I was and had to sell the TF as it was. Isn't it strange there are no proffessional companies offering a mobile glass scratch removal service like they do with scratches and dents on paintwork? I rang Autoglass and various local independent Windscreen repairers and they all said "it's not viable mate" If you Google glass scratch repair, loads of companies claim their products will do it! Wonder how true it is. Has anyone been successful with the toothpaste trick? __________________ [SIGPIC][/SIGPIC] Newbies do now!! 1. Plenum drains..all 3 or 4 year dependent 2. Cooling fan..All speeds functioning 3. Bonnet cable divider block

17th October 2007, 20:22	#10
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,753 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	In order to remove scratches by abrading away the glass, the abrasive has to be harder than the glass or it will not be touched. Toothpaste sounds like a non-starter to me. Maybe OK for paintwork, but not glass. I've not polished a windscreen before, but I have created parabolic mirrors by grinding and polishing glass discs and the standard abrasive used is carborundum powder (silicon carbide). You can get these powders in different grades from coarse to very fine. They use the same BS numbering system as wet and dry abrasive papers. The finest carborundum (say 800 grade) would easily take out very fine scratches, but would leave the area 'fogged'. This fogged area would then have to be polished using a finer abrasive paste like jeweller's rouge or cerium oxide. Both are as fine as flour, but extremly effective. The principle behind abrading and polishing glass is the abrasive should be coarser than the 'fault' you're trying to remove, or it will take much effort to remove it. That's why a series of abrasives, getting progressively finer, is used for mirrors. Each one removes the scratches produced by the previous one. I think to polish a windscreen, you'd need at least two abrasives if it isn't to take weeks to do the job. I suspect nobody does this commercially because of the effort involved. Once you've done one windscreen, you won't fancy doing another. TC Last edited by T-Cut; 17th October 2007 at 20:25..

16th October 2007, 20:56	#2
GreyGhost Banned 180+ Sport Auto Join Date: Oct 2006 Location: Bedford Middle Level Posts: 17,787 Thanks: 0 Thanked 18 Times in 5 Posts	Must still be some grit inside the rubber. When you get it sorted you should be able to cut the scratches off the glass using jewellers rouge. Best of luck

16th October 2007, 21:02	#3
Mr.Ian Avid contributor Rover 75 Tourer Join Date: Mar 2007 Location: Lancashire Posts: 126 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks GG you've made my day, thought i'd have to change the door windows to get rid of the scratches. Only slight scratches anyway but scratched all the same. I'll try n give the seals a good thorough cleaning, I was just wondering if it was one of our common little problems we have with these cars (only had it 7 months). Ian

16th October 2007, 21:08	#5
GreyGhost Banned 180+ Sport Auto Join Date: Oct 2006 Location: Bedford Middle Level Posts: 17,787 Thanks: 0 Thanked 18 Times in 5 Posts	The rubber seals are pretty tight I can only imagine something got in while the window was open and has been worked further in with use of the window, could just be a grain of sand or something even smaller

16th October 2007, 21:19	#6
SteveWaller Avid contributor Rover 75 cdti Contemporary SE Join Date: Aug 2007 Location: Northern Ireland Posts: 199 Thanks: 1 Thanked 1 Time in 1 Post	Mine has the same problem on the drivers side. The rubber seal was filthy and grit embedded in them had scratched the glass. I have cleaned the rubbers, but the scratched glass is still a problem. What would people suggest I use to try and polish the scratches out and where would I get such a product? By the way, giving the rubbers a good soaking in silicone lubricant helped a lot.

16th October 2007, 21:24	#7
GreyGhost Banned 180+ Sport Auto Join Date: Oct 2006 Location: Bedford Middle Level Posts: 17,787 Thanks: 0 Thanked 18 Times in 5 Posts	This is the best product for the job, not necessarily from this company. Do search for Jewellers Rouge on Google for more info. http://www.briliant.biz/products.asp?CategoryId=7

16th October 2007, 21:52	#8
Lates This is my second home Jaguar XE Join Date: Nov 2006 Location: Coventry Posts: 4,321 Thanks: 56 Thanked 59 Times in 55 Posts	Be a little careful with jewellers rouge as it can marr the surface take it slowly. Joking apart fine scratches can be polished out with toothpaste - and no it doesnt matter if its whitening.