My father imported clear polarised plastic covers to be put over number plates. From more than 5 degrees straight ahead the number plates were "blank". Must find the source....
https://mybroadband.co.za/news/broadband/656250-former-vodacom-heavyweight-has-a-message-about-starlink-in-south-africa.html
If this doesn't work for you, what would?
I wonder what plastic was in her underwear?
Fabric Heat Tolerances
Synthetic (Nylon, Polyester, Spandex): Softens and melts under direct high heat (like an iron or hot machinery) above 150°C (302°F); elastic degrades in hot dryer settings.
Cotton: Does not melt, but can scorch or burn at...