~One man’s opinion / observations ~
Try this it works really well
·Apply a quarter size amount of Autoglym Car Glass Polish™ (See note 1) to a damp foam pad attached to a Porter-Cable random orbital buffer, a white Velcro backed foam pad using speed # 4.
·Apply to half of the windshield, polishing first in an up and down motion then in a left-to-right motion and then repeat on the other side
·Wipe off any residue from glass and dry with a damp waffle weave towel
·Inspect glass for clarity and smoothness. Repeat if necessary.
Note
1.For deeply etched ‘water spots’ or pits (caused by sand or road stones) in the glass surface, do not attempt to polish them out, consult an automotive glass vendor as glass used on later model cars is soft and thin (this may vary by manufacturer) due to weight / cost savings by vehicle manufactures and polishing could cause glass to crack.
2.Some windshields and mirrors have a tinted plastic coating or a blue tint that will scratch or be damaged, only polish or use synthetic wool on uncoated glass.
~Hope this helps~
Experience unshared; is knowledge wasted…/ Jon
justadumbarchitect * so I question everything *