Rust Spots on 2014

I just noticed rust spots and the paint starting to bubble around my licence plate lights on my rear bumper.
I have the blue ribbon painted bumper and yes i live in Vermont with salted roads but really rust spots after 4 years!!!!!!!!!!!!!!

Going to the dealer Morrow im sure they will say nothing they can do.

 

Went to dealer today they took pictures and submitting them into Toyota ill keep you posted what they say

 

Yikes. 4 years even in VT shouldnt cause rust that bad.
Whenever its fixed start using dome kind of rust protection on the underbody and also the backs of bumpers and any metal parts. Fluid film is popular. Por15 paint is the best way to go but that's a lot of work. Stay sway from anything "rubberized"

 

I am going to get it oil undercoated this year for sure. My friend and my father have 10 year old Tundra's with no rust...........ill let you know what they say

 

Dealer said salt got in between the paint and the metal bumper causing the paint to bubble and the metal to rust. He said the truck is out of the 3 year paint warranty.

he did say the dealer would provide me a new bumper if i agree to pay the $150 for labor to install it.