According to the Zaino web site you have to use ZFX, at least initially. This is directly from the Zaino site:
For your initial application, enable Z-2 PRO™ by mixing with ZFX Flash Cure Accelerator as directed by the instructions included with ZFX Flash Cure Accelerator. It is critical that you use ZFX Flash Cure Accelerator with Z-2 PRO™ for the initial application, or if multiple layers are to be applied within a 24 hour time period............Whenever you layer Z-2 PRO™, you must activate it with ZFX.
In terms of durability, Zaino is better than other products I've used over the years. On my first
MCS I applied a number of layers over the summer and fall. Drove the car all winter out here in western NY, land of the road salt. The car frequently looked like a salt lick. During that winter I took it to a self serve spray wand car wash only one time to rinse off the salt. Water was still beading up and the finish was still shining when I was finally able to give it a decent wash in the spring. That was enough to convince me.
That's just my experience, and others swear by other products, but so far I'm happy with Z.