I can somewhat understand where you are coming from Scott since time, though only a few seconds, is money. As a hobbyist and occassional for profit detailer this mixing is no more irritating than adding sugar to my tea especially with the results received.
Zaino is a system that in the beginning required Z1 as the initial application pre-treatment. As the system developed along came ZFX that not only augments appearance and user friendliness, decreased application time (drying) but also offers the ability to apply multiply coats in one session if desired. Again, well worth the few extra $$ and seconds to use. On professional jobs one can just add another layer of Z2/Z2-PRO or Z5 on previously sealed customer vehicle. ZFX is not necessary. On new customer vehicles that request Zaino the availability of ZFX over using Z1 is actually a big advantage (time required for job). ZFX is a win / win product. JMHO
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