I've used everything to get streak free wipers, water spots, you name it.

(got the same results w/Zymol Cleanse & P-21 Paintwork Cleanser too)

Lots of rain in the PNW winters....

 

Using a Clay Bar is definitely the way to go for removing road film and grit from the windshield.

I was reading that the yellow clay is the best; Mother's clay is of the yellow variety.

 

Hmm, very interesting. I have been looking for good glass cleaner option. Looks like this might work...

 

Clay is a great product and many seldom clay the windows. You can definitely use clay on glass, wheels that are painted or chrome, bumpers that are chrome, etc. I would not use zymol hd cleanse or p21s cleanser on glass. It has oils in there that'll lead to streaking. Instead, use a designated glass polish.

The color of clay varies by manufacturer. There is only one company allowed to make clay in the US. So that means every clay on the market comes from them. The manufacturer such as Meguair's, Mothers, etc. will let the clay manufacturer know what the desired grit is and the color they want. You're right though...there is a great poly-clay that is yellow and is not sold in the US. You can tell it's the good one because you can stretch it as wide as your arm when pulling it apart.

Here's a great product to look into and we've been using it for almost 3 years now and it's the genuine article:

http://www.glisteningperfectionstore...s%2Ckit/Detail

The results last 12-18 months

 

I have heard of this but have not done it yet. Also, for a quick clean up, I use Invisible Glass by Stoner. I thinks it is better than Windex, etc. Aside from claying, here is another method - using steel wool. Have not used it and don't know how effective it is or what issues are associated with it -- just putting out there

 

Using steel wool is very tricky. The thing to remember is the glass has to be cold. If it's warm, it's a bit soft and you will run the risk of putting micro scratches in it and at night time, they can be a safety issue. If you are going to use wool, make sure it's oooo grade and use a soap/water solution for lubrication. Then follow it up with glass polish and glass sealant.

Best thing is to clay it and then use a glass polish.

 

Moe, I have many micro rock chips on my front windshield glass. What is the best way to remove them?

 

That is a great point. I have been told that Porsche glass is softer than other vehicles and as a result is more prone to road rash. I suffer from the same thing. What is the experiences of others? Any truth that Porsche windshields are softer and done so in an effort to reduce weight?

 

Unfortunately, rock chips aren't much you can do with. If it's really bad, you can get it replaced through your insurance and it doesn't raise you rates.

Make sure to get OEM SEKURIT glass from Porsche. It's usually around $500-700 depending on model of 911

I think Porsche glass is actually one of the better ones. I see more chips on Mercedes or BMW glass than on Porsche. I'll research this a bit more on Saint-Gobain/Sekurit website

 

amen to that my pnw brother! great tip, i'll try it. this doesn't work for water spots, but for glass shine, i don't know if anyone remembers the old trick of rubbing newspapers on the glass? worked great on my 89 supra back in my punky days. but of course, who has newspapers anymore?!?

 

Yah. . . iPads don't work as well. I had an 86 1/2 Supra!! It was my first car. . . . a hand me down from my dad in 1990. I loved that car!! Lots of good memories.

Back to the topic at hand. . . . I just purchased Griot's Glass Clay and it gave me an amazing result. After reading Moe's post, I guess it doesn't matter where you get it as it is all manufactured by the same company.

Regarding steel wool, be careful. I have used it and it does work, but I have also scratched glass with it. If you do use it, use the finest available (Finishing Grade) and do not use it in a circular motion. I'd also recommed using it with lubrication like glass cleaner or even glass polish.

 

Well, it looks like Porsche has switched suppliers from SGS to Soliver. They've been using SGS for decades, so not sure how the new glass will differ. Here''s a cool read about different types of glass

http://www.saint-gobain-sekurit.com/...v1=PR&nav2=AOP