Originally Posted By: grampi
It's been experience with Mequiar's protectants that they just don't last very long. I've found products like Duragloss, Zaino, and Klasse last much longer.
If you ask anyone in the detailing world what the longest, most durable wax is they should say Meguiar's #16 Paste Wax. You can't get it anymore in the United States (doesn't pass VOC). A can should last you over 20-30 years. I bought two cans in Canada and had them shipped to my house.
Ever since Meguiar's was bought by 3M, they have released some great products. I'm a big fan of their Ultimate Wax and Natural Shine Interior Detailer.
Their best product out right now is their DA Microfiber System. Do a search on YouTube. Works GREAT!