I washed car and put 3 layers of Mother's Carnauba paste on my car this weekend. Couldn't really tell a difference after the first coat. Will layering Mothers provide additional protection and shine like layering the Zaino seems to?

 

yup- you can layer carnubas...
they do need to cure just like synthetics.

if you are gonna layer carnuba and synthetic, make sure the synthetic is on the bottom (on the car) with the carnuba as the last step.
i have zainoed with a couple of layers of carnuba over.
i can tell the diff with multiple carnubas properly cured, but have not been able to tell the diff with synthetic followed by multiple carnubas

my fav is multiple synthetics followed by one layer of carnuba...
again, all need proper curing.