^You both are talking about a coating system that performs differently in different environments. I can’t say what’s better definitively but Chebbies don’t rust out any faster than other trucks. And that is the reason in the first place, right?
Fish, I’m guessing you don’t have extensive time with vehicles from the rust belt. And vice versa for someone else.
Heck even my 2016 with very little road salt exposure (comparatively) and a half dozen typical rainy seasons, the e coat is coming off in chunks or sheets or long gone on parts that are more exposed. But that’s prolly because it’s not a Ford…lol!
By the same token, I like “clean” and the wax coating is the opposite of that. But for some of those up north, it’s a way of life to make the undercarriage gross and dirty (winter oil coatings).
But I got a 22 year old Chebby and a 24 year old Dodge sitting in the driveway and neither of them are even beginning to rust out, anywhere. And a 17 year old Ford…also not rusting out.
Neither coatings are permanent…and neither are perfect.
Now galvanized! That would be GREAT! Hot dip the whole mfer before putting the body on top!
Bottom line is, if you drive in Texas, you could leave the entire truck bare steel and it might last longer than one from Minnesoooota. And if you don’t take any care in Minne you could have a vehicle with rust holes in it before the last loan payment!
Oh and never trust e coat as an actual substrate for any other coatings.