Safe and effective waatermark removal on glass!

[DivineWind]

anyone tried using Autosol Metal Polish on water marks before?
someone suggested it will react with the watermarks, which is heavy metal sediments anyway.

 

[Izso]

I doubt autosol will help. It'll probably remove the watermark but cause scratches since it's so abrasive?

 

[eohl79]

There are lots of polishes labeled as for both glass and chrome polishing. Glass is quite hard so it needs some coarse or fine abrasives with real cutting abilities. Autosol might work but i don't know how it would finish which also depends on the glass surface hardness, etc. Just don't forget to clean the residual oils away. The finishing and the amount of work done also depends on the technique and tools used - hand with plenty of elbow grease, ROB, DA or rotary. Watermark is not heavy metal sediment - mercury, lead, cadmium, etc. It is usually either mineral deposit or more severe - etching on the glass. That's why I worked on my car glass from least aggressive first to more aggressive method (but not the most aggressive as I don't have the products and tools). Always do a test spot first on an inconspicuous area first that won't hinder your visibility while driving. Inspect the outcome thoroughly under bright light. Don't forget, car windscreen and passenger windows are very important parts of the car for both protection and visibility.

 

[kc2]

Here are some pics of a condition that you should avoid using acid based watermark cleaners

Figure 21: Rear wind screen, tempered glass with wiper blade scratch marks

Figure 22: Zoom in of scratch marks

Yupp
agreed & the key is soak your 3m sand paper longer & let it be softer before sanding

YOU got very nice pic...thanks for taking time to share with us
thats lot of effort

 

[eohl79]

Yupp
agreed & the key is soak your 3m sand paper longer & let it be softer before sanding

YOU got very nice pic...thanks for taking time to share with us
thats lot of effort

Thanks for the good tip bro KC. wise sifu tips must remember

No problem, got inspired from all your works. Only can learn from sharing. Nothing to lose.

 

[Rafale]

No problem bro, just sharing info but just like KC said, front windscreen... some reservation there.



Wah... that front windscreen watermarks are bad. Before you go off doing any correction, the inspection and evaluation step is very critical. It will lead you to use the right tools, products and techniques for correction. I would avoid the sand paper, scotchbrite, etc.

I was using a 3M sanding pad/sponge. It is a microfine type with grit size between 1200 and 1500. So it is quite harsh by itself. Looking at the grit range indicates that the tolerance of the grit size and variation is pretty wide. Don't use it for fine paint work. Remember it is a sanding pad/sponge and not sanding paper. The key to using the sanding pad with the abrasive powder is water. The 3M sanding pad holds up more water than a regular sand paper with a backing. By controlling the amount of water that you spray directly on the pad and pressure applied, you can control the amount of polishing to the glass - abrasiveness. I try to maintain a consistent pad pressure and spray on more water after several passes to reduce the abrasiveness. you can get those fine grit sandpaper easily from those big hardware stores like CSM hardware in Shah Alam. Usually they carry up to 2000 grit. Sometimes they do stock 3000 grit too. However those sandpaper are not as high quality as unigrit type sandpaper. Always do a test spot first!

For front windscreen polishing, can try to contact the legendary bro Fishbonez for more info. He has done it before with a DA as seen from his blog.

THANKS to everyone for the "likes".

Hmm, its been 2 weeks since I last refer to this thread and looks like my ignorance has taught me a good lesson.
I tried rubbing my front windscreen using grit 2000 paper + lubricated with some undiluted carwash liquid and it resulted in tiny circular scratches & marrings/holograms all over the windscreen , I should've tested it with grit 5000 paper first instead of going on with 2K grit lol :stupid:

I'm going to look for the items you've used esp like the Osren waterspot and the 3M superfine sanding pad... at this point I'm not sure whether the scratches can be corrected or not or maybe I'll just get it replaced

 

[eohl79]

Hmm, its been 2 weeks since I last refer to this thread and looks like my ignorance has taught me a good lesson.
I tried rubbing my front windscreen using grit 2000 paper + lubricated with some undiluted carwash liquid and it resulted in tiny circular scratches & marrings/holograms all over the windscreen , I should've tested it with grit 5000 paper first instead of going on with 2K grit lol :stupid:

I'm going to look for the items you've used esp like the Osren waterspot and the 3M superfine sanding pad... at this point I'm not sure whether the scratches can be corrected or not or maybe I'll just get it replaced

Oh..oh. I've tried Osren sanding pad and watermark remover on tempered glass and find it almost impossible to.remove scratches. Front windscreen is soft and scratches easily. Still a bit reserved on trying it on my windscreen. Perhaps I will go to the windscreen shop to get a test piece from a broken one. That's why always do a test spot if unsure. Did you soak the 2000 grit sand paper long enough? Also did you use a backing foam? Good luck and let us know the outcome.

 

[Hitachi]

Just a heads up for those who plan to sand thier windscreen. Well never sand your glass with sandpaper or scotchbrite (message for car owners who leave their cars to maids for cleaning, works well on woks, not your car)

Note *3M Softback Sanding Sponge is no where near 2000# Sand Paper (Although it feels abrasive, it is actually quite fine). It is finer and it is not the same range as sandpapers or sanding discs. There's a sponge there that makes it much safer than a sandpaper with your hands or sanding pad.

PS: eohl, you can still use that Sanding Sponge which you have used although it doesn't feel gritty anymore. Use until you find it difficult to remove watermarks. Also we're working on a more ergonomic add on for the sanding sponge. Stay tuned

 

[eohl79]

Just a heads up for those who plan to sand thier windscreen. Well never sand your glass with sandpaper or scotchbrite (message for car owners who leave their cars to maids for cleaning, works well on woks, not your car)

Note *3M Softback Sanding Sponge is no where near 2000# Sand Paper (Although it feels abrasive, it is actually quite fine). It is finer and it is not the same range as sandpapers or sanding discs. There's a sponge there that makes it much safer than a sandpaper with your hands or sanding pad.

PS: eohl, you can still use that Sanding Sponge which you have used although it doesn't feel gritty anymore. Use until you find it difficult to remove watermarks. Also we're working on a more ergonomic add on for the sanding sponge. Stay tuned

Thanks Henry. Keep me updated once you have the new goodies. Hehehe.

Will go test on windscreen later.

 

[cheewooi]

KC,
I have the same problem on my gf myvi, not only on the glass, but the watermark also on the roof / paint. May I know how to clean it? I washed with ONR, but the watermark is still there.

What are the step and solution required to clean that?


Many thanks.