Spots on glass?

This worked for me...

How to remove calcium deposits on auto glass | Windshield Replacement - Auto Glass LA

 

Somewhere here yesterday I read a post from a guy who said he had great results from
using a claybar on his window. He said the clay "turned black."

 

Try a fine grade clay bar and quick lube. If that doesn't work I would use a glass polish like the Zaino product.

Zaino Store : Z-12 Clear-View Glass Polish

 

Without seeing pictures, they could be hard water spots. Clay, polish, then glass cleaner should take care of them!

 

+1 on clay, works great.

I have also used the finest grade steel wool with lots of Dawn dishwashing liquid as lubricant to remove irrigation/well water spots from the windows on my work truck, an F-150, that works too, but I don't know if I would do it on my Ferrari.
Alden

 

If you haven't found a solution yet there is a great product you can try out. You can get it at carpro-us.com its called Spotless. Works wonders on paint and glass.