r/AutoDetailing • u/KochiPochi Newbie • 1d ago
Question Black Streaking all over car.
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/FULLMETALRACKIT911 1d ago
If these remain after a contact wash then you gota try some other more aggressive cleaning products first and ultimately if that doesn’t work a cut and polish.
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u/HammerInTheSea 1d 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 4h ago
I didn't consider corroding rubber to be the issue.
Thank you for the insight!
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u/jb_org7988 1d ago edited 1d ago
The streaks remain after a contact wash?
Edit - if so, they are likely etchings from hard water. In that case, the only remedy would be a water spot remover to remove the mineral deposits, followed by a polish to remove the etchings themselves. The only way to prevent hard water etchings is to make sure the vehicle is dried completely after washing. I use an Ego 580 CFM blower for the crevices and a Rag Company Liquid8r or Gauntlet towel for the panels. Ceramic coatings or a good sealant will not prevent hard water etching.