We've just bought a new 6 Sport in soul red

Looking underneath the car, more so at the rear, it looks like the underside of the car has zero rust protection. I can see that under the boot floor the metal is light grey, so its not painted red. Wondering whether I should give it a spray with some rust inhibitor, like Dinitol or Bilt Hamber? Any thoughts?

I'm not sure what this gen 3 is like with rust, I know the gen 2 had issues