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Old 10-19-2018, 12:25 AM   #1
Scooby Newbie
Member#: 404788
Join Date: Oct 2014
Chapter/Region: MWSOC
Location: Kentucky
2018 WRX Limited
Heritage Blue

Default Some type of stain "rust" under heritage blue paint

I was detailing my car yesterday and noticed this almost stain in the paint. It was not there on 9/26 when I hand washed the car last. I have the opticoat coating on the car as well.

I cannot hit it with a fingernail and cleaner wax did not remove it. I'm not sure if wet sanding would remove it at this point either. Taking it into the dealership to see if it is covered under warranty since the car only has 4700 miles on it and I just got it in April.

Curious if anyone has seen this before on a Subaru or any other ideas to try to clean it up? Just dont trust the dealership to not go crazy and pain half the car to "fix" it and then I'm out the money for the opticoat again.

Photo here:
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Last edited by subirex116; 10-19-2018 at 12:27 AM. Reason: Photo
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Old 10-19-2018, 12:50 AM   #2
Scooby Newbie
Member#: 492616
Join Date: Oct 2018
Chapter/Region: NESIC
Location: Massachusetts
2015 WRX
WR Blue Pearl


Subaru offers 5year/unlimited mile on rust coverage.
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Old 10-21-2018, 03:00 PM   #3
Scooby Newbie
Member#: 451697
Join Date: Jul 2016
Location: Virginia
1998 Outback Sport


Where is it located on the car? Behind the wheels, maybe indicating something from the road? Or on a top surface, indicating something from a tree possibly? I've seen that orangish color fallout from trees before.

Clay would be one of the first options to try. Then isopropyl alchohol and/or acetone.
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Old 10-21-2018, 08:23 PM   #4
Scooby Newbie
Member#: 492327
Join Date: Oct 2018
Location: A garage in the Midwest
2019 WRX / 16 STI
2017 Golf-R, etc


Right, is it staining from tire dressing by any chance? My dealer dipped my tires in heavy glaze when I drove it off the lot and it left dots of stains on my white 19' WRX from sling. I was pretty pissed because clay, degreaser, polish, etc did not work as it was stained in the clear coat.

Knowing that one way to remove such stains is leaving the car out in the sun, I let UV do the work. Took a good 7-8 weeks, but it is completely gone.
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Old 10-23-2018, 08:50 PM   #5
Scooby Newbie
Member#: 454773
Join Date: Sep 2016
Chapter/Region: MWSOC
Location: Traverse City, MI
2012 Impreza Sport
Pearl White


Originally Posted by Ch0ps View Post
Subaru offers 5year/unlimited mile on rust coverage.
That only covers perforation so this wonít be covered. Doesnít really look like rust though looks like itís on or in the paint.
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Old 10-23-2018, 10:07 PM   #6
Scooby Newbie
Member#: 472037
Join Date: Jul 2017
Chapter/Region: MWSOC
2018 WRX Limited


Have you tried soaking it with some quick detailer?
It looks pretty surface.
Also I don't see how that can be rust when it's on plastic bumper.
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Old 10-23-2018, 10:17 PM   #7
Scooby Newbie
Member#: 485973
Join Date: May 2018
Location: In a house
2018 WRX STI


Do you have any Iron X? It is hard to see what this is from the image, but, if the dealer does not do anything about this, I would first try Iron X (in the event this is just surface oxidation caused by some sort of metal particles that landed on the paint) and then a fine grit clay bar if the Iron X does not remove it (you may want to check with the installer of your ceramic coating what clay bar they advise that can remove bonded contaminants without removing the ceramic coating itself. IIRC, Pinnacle makes a detailing clay that is made specifically for that purpose.)
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