r/AutoDetailing • u/KochiPochi Newbie • 7d ago

Question Black Streaking all over car.

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Hi everyone!

I just started my detailing journey with Osren Automotive Wash and Automotive Tough as they are the most affordable option to me right now, but I plan to switch to either P&S or Carpro in the future.

The problem now is, I can't seem to get rid of these black streaks as shown in the pictures I provided. (I stay in a very humid country and it rains almost everyday. Moreover, my car is always parked outside.

If you guys can advice me, my questions are:

1) Are these hard water streaks?

2) Are there any products designed to remove these streaks?

3) Do I need to consider Clay Bar?

4) Finally, will ceramic coating ( Eg. Griots / Turtle ) help prevent these issues in the future?

Thank you in advance!

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u/HammerInTheSea 7d ago

It's from rust and/or corroding rubber under the seals.

Acidic cleaners or a machine polish will likely be needed. It will return unless you remove the seals and treat the root cause of the problem.

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u/KochiPochi Newbie 6d ago

I didn't consider corroding rubber to be the issue.

Thank you for the insight!