Wool Wax lasts longer. I have a 2019 F-450 that was coated by a professional detailer not long after it was first purchased. I bought it used, and it still has a healthy coating on it. The did the underside and all cavities even though its aluminum and doesn't really need it. It is a Green Bay truck and has NO rust at all underneath.
I just picked up a 2014 with 170K on it, I haven't found any rust yet, but when I do it will get repaired and will give it a healthy dose of Wool Wax so it lasts. It runs great, though it might have a bad u-joint in the driveshaft as it has a light rumble when accelerating.
I just picked up a 2014 with 170K on it, I haven't found any rust yet, but when I do it will get repaired and will give it a healthy dose of Wool Wax so it lasts. It runs great, though it might have a bad u-joint in the driveshaft as it has a light rumble when accelerating.