I recently got a new vehicle from Honda, bought it about 2 months ago. I saw that they are offering rustproofing services.

They offer the following:

1. full rustproofing at P6K+
2. yearly rustproofing at P2K+

I'm just new to these stuff, I would like to ask, what's the difference? considering that my car is new(around 2 months), would I need one of these? and why?