Engineering360: "Rust and rattle-proof design reinvents license plate mounting"

Every car manufacturer afaik uses frames made from plastic ( that is recyclable ) and motor vehicle departments issue plates made from aluminum. Even the attachment fasteners are made from aluminum and plastic.

As to the location of a region that uses metal plates and frames, this must be a 3rd world country where spending any amount of money on exotic silicone frames would be considered hardly trivial.

I am pretty sure Ohio plates are not aluminum. They rust in only a few years.