I have a 04 SUV, and I’m starting to notice the rust getting bigger underneath the paint. How does that happen? How do cars rust underneath the pain?
In: Other
It means water is getting inside the body panel through some other means. The way the body panels on cars are overlapped is so they form channels for water to flow around and down to the ground. But if there’s a missing seal or gasket somewhere, the water gets inside and rusts the panels out from the inside. For example if the weatherstripping on your door windows isnt’ in good shape, water can get into the door itself. Now there should be drain vents to let the water get out of the door, but sometimes those get clogged and voila, now you have water in the door.
My car has rocker panel drain plugs in the front of the rear wheel well. Well my model year and a few years after it, the drain plugs didn’t fit quite well enough so they let water from the wheel splash get in… and the rocker panel was full of sound-deadening foam for those model years, which just soaked up the water like a sponge. Now my rocker panel is rusting out.
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