You're absolutely right that regular washing and waxing help protect painted surfaces from water spots and acid rain. One area that's often overlooked is the rubber weatherstrips and door seals around the vehicle.

Acid rain, UV exposure, and road grime can gradually dry out rubber seals, leading to hardening, cracking, or loss of flexibility over time. Cleaning the seals with mild soap and water, followed by applying a rubber protectant or silicone-based conditioner, helps keep them supple and maintains a better seal against water and dust.

Whether it's the paint or the rubber components, consistent maintenance goes a long way in extending the life of your vehicle's exterior.