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Old 09-02-2011, 09:56 PM
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Weird mottling paint issue

Hello All,

My car was invovled in a rear-end collision a while back and I ended up having the trunk lid repainted (base/clear). So far so good. However, there was a minor defect in thr paint and the shop ended up repainting it a few weeks later. I got it back about a week ago and went over it with a fine toothed comb today. I washed it and afterwards I noticed what appeared to be really bad water spots on the decklid (which was weird since I had washed it in the shade and hadn't let it dry with water standing on it). I hit it with a cleaner/wax thinking that would take care of it, but it didn't do anythin. I then began to examine them more closely and they look like they are between the base and clear (or in the base itself). The "spots" look like a bunch of, well, amoebas or paramecium looking things and there are a ton of them. I will try to snap some pics, but man is it hard to get a good shot of them. Here is one attempt:



You can see a pretty good example in on the left side by the black trim. If you look closely you will see two or three more. They are anywhere from a quarter inch to half inch each. Under the right conditions they stick out like a sore thumb (they are all over the lid). Under other conditions (direct sun) they are almost impossible to see (which might explain how I missed them or just figured they were water spots).

Any ideas before I head back to the body shop. I can just see the discussion now ("I don't see any spots? "no, that's just a water spot", blah, blah, blah).

I would consider reshooting it myself, but frankly, I shouldn't have to.

Thanks Guys

Chris

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Old 09-02-2011, 10:33 PM
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Those look like fisheyes to me. Your painter must've painted over greasy area. Probably need to repaint it for free if they stand behind their work.
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Old 09-03-2011, 05:13 AM
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Agree with mit, this has been there all along, the pattern looks like either compressor shot out a build up of oil or water vapors and they may have tried to dry spray and fill and were pretty successful at hiding it but over time some of it soaked back.
Or could just be some spot contamination.

No real damage done and if a enough clear, they should now after all this time be able to 1500 and buff and it will be gone for good.
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Old 09-03-2011, 11:34 AM
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If there is a contaminant under the clear such as oil from someone touching the base with bare hands or poor air you can sand and buff but it will raise it's ugly head again. If there was a repair done in that area and primer, base and clear applied in a short time frame, as all that film thickness cures it can shrink, usually sanding and buffing will take care of it.
A reputable shop should stand behind there work.
Good luck
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Old 09-03-2011, 03:56 PM
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Guys - thanks very much for the replies so far! Here are a few more pics - let me know if this confirms or changes your remote diagnosis (and repair action).











As gross as these look , in full sun they are virtually invisible!
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Old 09-03-2011, 04:02 PM
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almost looks like clear coat was peeling and they shot over it
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Old 09-03-2011, 04:41 PM
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Seeing these pictures, totally throws my first theory out the window, there is a lot more to this then an isolated spot, almost looks like someone washed the base with wax and grease remover and it did not dry long enough before clearing but who knows?
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Old 09-03-2011, 07:20 PM
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Sooo...(and I know this is a tough question since you guys can't see this in person), but in your opinions does this need to be all sanded off and then re-based/cleared OR can it just be scuffed and re-based/cleared? I know the "safe" option is sand it all off of course, but I'm sure the bodyshop will push for the latter.
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Old 09-03-2011, 08:07 PM
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Pictures are a tough deal, once the bodyshop sees it, they should know what it takes to fix and may just need a light wet sanding and buff.
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Old 09-04-2011, 08:30 AM
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I agree with Barryk, looks like the base was wiped down with something and was not completly dry when they cleared over it. there should be no need to clean base before clear, most basecoats have a window of 8-24 hr to be cleared,should only need to be tacked off. buffing will most likley only be a temporary fix, what ever is under clear is still under there.
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Old 09-04-2011, 04:22 PM
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Thanks Guys! I appreciate all the feedback and your expertise. I'll be taking it to the body shop after the holiday weekend...hopefully I won't get any grief. Will let you know how it plays out.
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