There is a specific glass polish as per my knowledge but for this kind of stuff, probably you want to get professionals to do it. My colleagues tried doing glass polish by himself and ended up changing the whole windscreen.

CarPro CeriGlass. depends how deep the watermark on ur windscreen

Generally, the correct compound to use to polish and windows is compounds that contain cerium oxide (key component). This is even available in pure powder form and can be used to polish windscreens once added with some water to make a paste. However, it depends on what defect u are trying to remove. Are u trying to remove water marks/spots or scratches? Does your rear windscreen have wiper attached (like typical hatchback cars or SUV), or no?

Also, just to note that side mirrors are not the same glass material as the windscreens, so removing waterspots with this method is highly NOT advisable.

On a side note, there is another method that is highly NOT recommended historically to clean waterspots, which is by means of using acid. However, in my recent polishing round of my wife's car, I had found that acid with the right dilution can still be highly effective and still safe (to a certain degree) to use. I do have to note that I have only tested it on one car (Toyota Altis) windscreens, and results may differ for other cars. Nonetheless, I believe it is worth sharing it as well.
Hmm, if your friend ended up changing the windscreen, that would mean the polish he used scratched his winscreen more than removing waterspots. Perhaps u could share what he used and how he did it for our analysis?

Sharing some roof spoiler shots after the evening downpour.   

erm, i dont know what plate number you searched, but i dont have 3 summons unpaid

By 'watermark' do you mean dark lines running down from places such as door handle and side mirrors? Or watermark as in dried water droplets on car paint?

Also, mind sharing what cheap wax you got last time and how did it spoil your car?

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Thanks for the recommendation, it's a bit on the pricey side at RM109 per bottle on Lazada,
https://www.lazada.com.my/products/turtle-w...Pfhz0J&search=1
Is there any cheaper alternative? maybe RM60-80 per bottle is ok...

Just did a quick DIY on a small area [too small in the end] during my lunch break:
I didn't take the end result after removing the tape cos I seriously couldn't see if the swirls were reduced against the untreated areas. Will wait for brighter sun to be out to assess the paint again.

Sharing a short video of the beading in action during the recent downpour:

That's cool bro. How's the effect on the screen? Similar or better water beads like Soft99?

Would be interesting to try also since I tend to use S&S for paintwork - worry will streak on the glass areas.

i dont know anything about polish & wax..just buy what best seller at shoppe..

Just to share my pride and joy:


I know it does seem rather ah beng of me to do up this way - rather think of it as striking out in a sea of ubiquitous rides since Myvis are practically everywhere. 

Hi all sifus. What are y'all recommended to maintain a coated windshield? Thanks in advance.

windshield bro