I have heard people say they have 20 coats of wax on their car.

Can you build up wax coats or does another wax job just replace the last wax with a renewed coat? I have read on another site that Zaino "polish" can have 20+ coats and it just gets glossier. Is that true or it that just customer hype? I have tired 3 coats of NXT and Zaino and can't see any build up, just the same look. Does any one really know if wax coats can be layered?
Thanks!!

Corky Stanton
corkystanton.com