Meguiar's Ultimate Paste Wax or Turtle Wax Ice??

use nufinsh it will last longer then any other wax or polish out there.
You need a polish not a wax .Wax breaks down.
This is what I do
wash your trailer with awesome(this will make it easier to deoxidation)
meguiars power cut compound #M91(for deoxidation)(orange pad)
nu-finsh(white pad)after the first app I put a second one on 2-3 week after
I use a portal cable DA polisher with lake country pads
my trailer will shine for about a year