Well, all that is moot if it's mailed from the US and, instead of going across the Pacific, it goes over the Atlantic, across Asia and into Austrailia. Then, with the passing of the Earth's magnetic field in the opposite direction, and combined with the proper travel in the direction of the Earth's rotation, the mirror's silvering will become automatically degaussed for his upside-down orientation.

__________________
Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k