Meguiar's makes some decent products, I am currently using their Gold Class liquid wax after removing the oxidation with their Ultimate compound. I'll share some advice: if you have enough of it, elbow grease produces the best results. I haven't made it all the way around my rig yet nor has the wax job been put to the test but I do know that the more you spend on a product, the better the quality of it.
Always remember, hills are only speed bumps on a bigger scale!
2013 Sabre 34 REQS-6 pushing a 2016 GMC Sierra 6.0L 2500HD