Check your warranty book:
http://www.infinitiusa.com/content/dam/ ... _I_WIB.pdf
EXCLUSIONS
This warranty becomes void when damage results from:
1. Accident, collision, faulty installation, or any alteration to the panel, panels, or vehicle that could be reasonably expected to affect the performance of the covered panel.
2. Environmental conditions, such as hail, lightning, or acid rain.
3. Vehicle neglect, abuse, or use of the vehicle for unintended purposes.
4. Stone chips, scratches, or other paint damage that lead to surface rust damage.
5. Cleaning and polishing chemicals, and solvents, including improper undercoating, or other rust prevention materials.
I would take it in and have Infiniti evaluate it.