[RWebb]

what really matters is what you do BEFORE waxing

all waxes are just carnauba wax with some additives to liquify it - Zymol is over-priced, way way over-priced...

non-wax "waxes" last a lot longer, but you don't care about longevity for a concours

use a buffer (I use a random orbit sander with a foam pad)

a concours judge will look all over the car - places you did not know existed...

have fun!