PSA for Tundra owners with a plastic bed liner or those looking to buy one: Check under the liner. Was planning on replacing the liner with Line-X on my otherwise pretty rust-free
Can You LINE-X Plastic Fenders? | LINE-X
Environmentally Friendly Water Based Rubber Truck Bed Liner in Dust Grey (4-Box) BU41004 - The Home Depot
Can you spray the underside of your car with truck bed liner to prevent rust? - Quora