Environmental conditions today do demand more frequent waxing to prevent costly damage to the outer layers of paint. However we don’t recommend applying two or three coats of wax at one time. While there is some slight incremental protection with each application, the effort vs. reward quickly diminishes after two coats. You’ll gain greater benefits by spreading the same number of applications over a longer period.

In other words, rather focus on getting a 100% coverage with a single application, and wax more often.