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Paint defect? What is it, and how do I get rid of it?
Hello all,
I was washing my car today and noticed these little pin-head sized paint bumps on the rear trunk lid. They look like possible overspray marks or dirt that got caught in the paint. Can anyone help me identify them? What would be the best way to remove them? Or should I just leave it alone? Many many thanks in advance.
I circled the area on the attached photo. The dots are about twice as big in the photo as they are on the car. It was hard to get a good picture with the glare from the sun.
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Super Member
Re: Paint defect? What is it, and how do I get rid of it?
Given that they are bumps it is most likely above surface bonded contaminants as Mike Phillips describes them. I would start with a clay and clay lubricant on a small section of them. See if they come up. If not you might need to step it up to an IPA solution.
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Re: Paint defect? What is it, and how do I get rid of it?
Alright, that sounds like a good start. I was planning on doing a clay/wax next weekend, so hopefully that does the trick. Any chance it's something more serious, like paint blistering/beginning to fail?
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Re: Paint defect? What is it, and how do I get rid of it?
From the picture imo it looks like its under the paint and not a contaminent on top of the clear. Hard to tell in the pic
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Re: Paint defect? What is it, and how do I get rid of it?
How old is the car? Has it ever had any body work?
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Re: Paint defect? What is it, and how do I get rid of it?
2007 Porsche Cayman. I bought it last year from a reputable place near me. they said they believed it has not had body work, and the pre-purchase inspection was clean as well (i specifically asked about repainting). but the car lives outside and is exposed to the elements. if it's just a surface contaminant or a bit of dirt under the paint, i can probably live with it (assuming i can't fix it). my biggest concern is that whatever is trapped under the paint will expand and turn into an ugly bubble. i can't imagine that having a Porsche painted comes cheap...
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Re: Paint defect? What is it, and how do I get rid of it?
Well, IMO it's definitely not on top of the paint. It does look like it could be the start of rust bubbles, but honestly they look too "smooth" for that.
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Re: Paint defect? What is it, and how do I get rid of it?
I don't have any experience with rust bubbles... would they be "hard" to the touch like sandpaper, or would they be kinda soft like a blister on your finger?
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Re: Paint defect? What is it, and how do I get rid of it?
It kind of depends where they are in the corrosion cycle. At some point you will be able to pop a rust bubble, but at the beginning they may be hard--I try not to push on them unless I'm ready to fix them.
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Re: Paint defect? What is it, and how do I get rid of it?
Alright, thanks very much for your help. I've actually noticed that these little dots are in several different places on the trunk lid. There's one cluster of about 20 of them, then there's another small area that has 2 or 3, then there's another different area that has 2 or 3. They're not centralized and there's no clear rhyme or reason why they are where they are. I'm now thinking that some panel (like the rear bumper or spoiler) was re-painted and these little dots are overspray from a bad tape job. Wouldn't it be unlikely for rust to appear simultaneously in that many different locations? I guess anything is possible.
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