How to Remove Water Stains on the Car After Rain?

[StRicardo]

Spray the prepared cleaning solution onto the paint surface, then perform a full-body clay bar treatment. After completing the clay bar process, rinse the entire car again with a water gun and dry it with a towel. Use automotive polishing compound with a car wash sponge to scrub the water stains until they are removed.

[DeHaven]

I find those watermarks on the car after rain quite troublesome. Those grayish-white marks are mineral deposits left behind after rainwater evaporates. I usually use warm water with mild dish soap, soaking a soft cloth first to gently wipe them away—never using hard objects to avoid scratching the paint. For stubborn stains, I mix equal parts white vinegar and water, spray it on, wait a few minutes before wiping, as the vinegar's acidity helps dissolve mineral residue. After wiping, I rinse immediately with clean water to prevent lingering vinegar smell or new stains. As a routine, I wash my car the next day after rain or apply car wax regularly—wax helps prevent water accumulation. Ultimately, acting quickly to keep the car clean makes watermarks less likely to form and preserves the paint's shine longer.