What to Do When Water Stains in Underground Garage Won't Wipe Off?
3 Answers
Purchase a scale remover; white vinegar can also be used. Dilute the scale remover with water. Place toilet paper over the water stains and pour the diluted descaling solution on top. Cover with plastic wrap or a bag and let it sit for two hours before removing. Rinse with clean water, and the car paint will look as good as new.
Last time I encountered the issue of a leaky garage roof that couldn't be cleaned properly, I later discovered it was due to a clogged sunroof drain hole. Leaves and mud were stuck in the drain pipe, and using a bicycle brake cable was enough to clear it. If the seal is aged and leaking, it's more troublesome—you need to use a heat gun to remove the old sealant and then reapply body panel adhesive. Leaks from body welds are even more of a headache, requiring a trip to the repair shop to strip the interior and locate the leak. Remember to first test the leak location with a water spray to find the source before fixing it completely. Finally, use scratch wax to remove water marks—apply it several times until the marks are no longer visible.
The stubborn water stains on the garage ceiling are likely caused by roof drainage issues. There are drainage holes at all four corners of the sunroof - you can see small openings by lifting the weatherstrip. Test the drainage by injecting water with a syringe, and use compressed air to clear any blockages. Deformed roof seals that don't compress properly can also cause leaks, requiring complete weatherstrip replacement. For leaks around window edges, check if the seals are displaced or cracked. When treating water stains, first apply detailing clay for ten minutes, then gradually polish with a machine polisher using glaze compound.
