Yes, that would be nice.
Anyway...with rust already showing on much of the undercarriage, and MANY trucks (from many manufacturers) having either a reputation for rust (ehhhh...Dodge) or actual rust problems (ehhhh....Toyota) I'm trying to avoid problems.
I know some things start off as habit/best practices, and then even when the problem is no longer a problem people continue to do what they always did (my uncle always changed oil every 3,000 miles - even LONG after he started using synthetic), but in this case, I think rust is still a problem and is not adequatly addressed by manufactureres.
That said, I noticed no one at the dealer offered to sell me undercoating...no recommendation, nada. So maybe I would be doing more harm than good.
I'm always up for doing less...
"Udercarriage" meaning? the frame? or the underside of the body?..... Either way, Undercoating won't help at this point - sealing in the rust only hides it while it continues to eat your metal.
Many years ago I was buying a Toyota - and when I was to pick it up, sitting in the finance office the bill is several thousand higher than agreed upon - their explanation? - Add-ons - They supposedly did an alarm system, window etching, undercoating/Rustproofing, etc.
I told them I never authorized ANY add-ons - since 1)The car had a factory alarm, 2) Undercoated & Rustproofed from the Factory, window etch? wasn't asked for (and wasn't even done!) I made them remove the charges.... told them they were welcome to remove any added on items..... Anyway, nothing had been added to the underbody to begin with (someone didn't know that I had the car up on a lift already.... oops.)
Anyway - Toyota Trucks had/have a rust issue - and a recall. They're replacing the entire chassis on my uncle's tacoma - $15,000 work for into a $7,000 truck LOL!