Yesterday the brown truck dropped off my used 1/2 windshield from a salvage yard in AZ.
It was cheap, and being cheap I expected to see a lot of scratches.
Not to be disappointed , lol , when I opened the box that was confirmed , along with surprise
a white haze from some sort of improper chemical used to clean the windshield
1st step is to wet sand with 1500 grit sandpaper and a sanding block.
Then buff with rubbing compound , a compound pad - foam or wool - wet sand again with 2000 grit sandpaper .
It should look something like this - as you are thinking what the heck did I just do to this , now its ruined
Apply compound - 3m Finesse in this case - and buff at 2000-2500 rpm
I clamped the windshield to the work table with welding clamps using cardboard spacers to keep the windshield in place .
Clamped away from the area I was working on & also clamped it in areas where the mount holes are or at the bottom where the trim strip goes.
After initial buff you probably will find that more wet sanding is needed with 1500 or 2000 grit depending on scratches depth . I chased a couple deep scratches , was able to remove one and knocked the other one down considerably to where its transparent .
I sanded again with 1500 , Buffed again with compound sanded with 2000 , then buffed again .
Then you are going to think -hell , I'm making this problem worse , its not getting better !
That's when it's time to change pads and compound .
I used automotive scratch and swirl remover & a foam compound / swirl remover pad