Tks Bigtodd!
Bernard gave me his solution from his vacation spot:
"You should already try to varnish your windshield with a colorless gloss varnish of some kind.
I found in my travel disk these pictures that show (badly) the difference before and after.
Your windshield doesn't look much more opaque than my lantern glass.
The guy I posted above was also like that before.
I use classic wood gloss varnish. One coat on each side.
The result is amazing."
