Took 20 years off my windshield!!

[jakeru]

Originally Posted by ArizonaDan

@jakeru depending how badly your windshield is marred, it may take quite a bit longer than 20 minutes.....I had some heavy wiper blade marks on mine....took me closer to 1 1/2 hours as I worked in small sections...about 2 ft square....buff...clean the section...evaluate...repeat as needed while viewing from all angles to ensure you got all the marks.

no distortion afterwards.

Originally Posted by Jthoms1

Agree with Dan....mine was far quicker but it could take you longer. No distortion just beautiful clarity.

FYI, guys, after driving around with the half-polished windshield, I've come to realize the polishing operation actually has added some distortion, which is a contrary result to what you said above.

I suspect it's done it for you other folks who have polished, but just not to a severe enough degree that it's been noticeable to you guys. If I polished my whole window so I didn't have two adjacent alternatives (unpolished vs polished) to compare, I may have not noticed it too. It's a bit subtle, to the point it would even be challenging to capture with a photo.

But if you want to look for the degree of distortion through the windshield, the best way to notice it is to find a perfectly straight feature on the other side of the glass (like straight edge of a highway median), look at it through manually polished vs unpolished surfaces. Through unpolished, oe Porsche glass, (very good quality in terms of being distortion-free, by the way, especially considering its varying curves) the straight feature appears, well, straight; but through the manually polished surface, well, I'm noticing that same feature gets a bit "wavy" on mine. Most noticeable when your face isn't right up close to the glass, in fact, it might be easiest to observe from the outside of the car, looking all the way through it glass canopy to the other side.

As the cause of this is basically uneven material removal across the optical surfaces, I do wonder if using an interface pad between the relatively thin/stiff rayon polishing pad and the backing plate, and perhaps using less pressure may have allowed a bit more even material removal.