Best way to transport a 64-66 Barracuda back glass

I buffed out many, many (50 year's worth) scratches out of my daughter's '59 Studebaker Silver Hawk windshield using some of this stuff:

9Pcs*Glass Polishing Kit Scrach Remover 8OZ Cerium Oxide Powder 3'' Wheel Pad US | eBay

I was really happy with the results. You can buy it in the US but it's way more expensive. It takes about 4-5 weeks to get here from China but the darn stuff works!!
PS - 8oz is plenty to do both front and back glass and maybe some side glass. What do you have to lose???
Treblig