Under coating

Is it necessary to under coat (like Ziebart) the new 4Runners or Tacoma’s?

 

https://www.4runners.com/threads/lets-talk-under-coating-rust-prevention.11152/#post-120866

 

I live in an extremely hostile winter environment in a snow belt outside Toronto, surrounded by the Great Lakes. Maybe similar to where you live, in NY. The problem with surface sprays is that when you drive at high speeds the sand/salt slurry on the road is liquid sandpaper on the underbody. I’m trying a corrosion module on my 4 Runner, but really it’s only for the 10 year warranty. I’ll sell it before then. Rust is inevitable where I live so I plan on that obsolescence factor.