Warranty| page 32, What is Not Covered“Damage or surface corrosion from environment such as acid rain, airborne fallout (chemicals, tree sap), stones, salt, road hazards, hail, wind storm, lightning, floods and other acts of God.”

Owners Manual| page 7-90, To help prevent corrosion“You can help prevent corrosion from getting started by observing the following:
Keep your vehicle clean
• The best way to prevent corrosion is to keep your vehicle clean and free of corrosive materials
• If you live in a high-corrosion area — where road salts are used, near the ocean, areas with industrial pollution, acid rain, 

Keep paint and trim in good condition
• Bird droppings : Bird droppings are highly corrosive and may damage painted surfaces in just a few hours. Always remove bird droppings as soon as possible.”