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04-26-2026, 12:28 PM
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#1 |
 Drives: 98 Trans AM Join Date: Nov 2019
Location: Boston
Posts: 12
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Blotchy Carbon hood insert?
I put my ZL1 away for the Winter last November and the carbon hood insert was pristine. I uncovered my Zl1 this Spring to find this blotchy appearance. Nothing I have tried is helping. Hoping someone here has seen this and has a solution. Thanks, Mark
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04-26-2026, 07:32 PM
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#2 |
 Drives: 2018 ZL1 Convertible M6 Join Date: Nov 2019
Location: USA
Posts: 66
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Yikes, was it exposed to water on or under the cover? Even a humid environment?
Have you tried an ultra fine polishing compound? (spot test in case the clear coat on the insert is not the same as the paint's clear coat. |
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04-26-2026, 08:03 PM
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#3 |
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Drives: 98 Trans AM Join Date: Nov 2019
Location: Boston
Posts: 12
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No water, use 3 car covers. Definetly no humidity, was the coldest Winter in a long time in the Boston area. Have a bad feeling it wil need to be replaced :(
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04-26-2026, 08:42 PM
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#4 |
 Drives: Camaro SS 1LE M6 Join Date: Feb 2024
Location: Las Vegas
Posts: 459
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Try a vinegar solution, looks just like water spotting we get on our boats.
__________________
2018 Camaro SS 1LE M6
Stainless Works Headers & X pipe | Redline Axleback | E85 | Rotofab | Soler Ported TB | LT2 Manifold  |
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04-27-2026, 01:59 AM
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#5 | |
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Super Stock
Drives: Chevrolet Camaro ZL1 Join Date: May 2022
Location: Concordia
Posts: 984
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Quote:
Agreed. The coatings on these carbon inserts are actually sealed up using the same sort of gel coat that comes on fiberglass boats. It should be treated the same way you would treat that finish.
__________________
2017 Red Hot ZL1 A10 - Apex ARC-8's, 305/ 325 PS4's, DSX 9.06 12% lower, Griptec OE upper, NGK HR7 Ruthenium plugs, Nostrum 25+ injectors, XDI Goliath HPFP, Katech dual in tank LPFP, Katech oil pump, LME tensioner, DOD delete, LT1 big fuel cam, Jokerz ported blower, MPI lid, GMS hood extractor bracket, Granatelli SS plug wires, Cordes LTR reservoir, DMS T-stat housing, 186* LS3 T-stat, Borla X pipe, Black Widow Angry Housewife/ Corsa NPP mufflers, BMR engine mounts, Banks iDash, Lithium Battery, AEM X- Series, HP Tuners, E85, 16.5 psi
758 HP/ 804 TQ  |
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04-27-2026, 12:57 PM
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#6 |
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Drives: Chevy Camaro ZL11LE Join Date: Jan 2026
Location: United States
Posts: 79
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I live in NH as well. My CF insert went through the same cold unscathed, but also uncovered the whole time. I suspect condensation caused moisture to accumulate and maybe freeze causing those spots. I'd try buffing it out with some fine polishing compound using an orbital buffer. I've done mine a few times and it's come out looking fine. So you can't really hurt it this way
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04-27-2026, 06:40 PM
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#7 |
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Drives: 98 Trans AM Join Date: Nov 2019
Location: Boston
Posts: 12
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The vinegar solution sadly did not help. I had already tried compound with random orbital buffer, that didn't work either :(
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04-27-2026, 07:37 PM
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#8 |
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Drives: 2018 ZL1 Convertible M6 Join Date: Nov 2019
Location: USA
Posts: 66
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Are you seeing any level of improvement at all as you try different things?
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04-27-2026, 08:31 PM
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#9 |
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Drives: Camaro SS 1LE M6 Join Date: Feb 2024
Location: Las Vegas
Posts: 459
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Can you feel those spots if you rub your finger on them?
__________________
2018 Camaro SS 1LE M6
Stainless Works Headers & X pipe | Redline Axleback | E85 | Rotofab | Soler Ported TB | LT2 Manifold |
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04-28-2026, 01:47 AM
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#10 |
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Thank you Al Oppenheiser!
Drives: Red Hot A10 ZL1 Convertible Join Date: Jun 2017
Location: Sarasota, FL
Posts: 5,181
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Probably moisture haze. Let it sit in the sun (direct full sunlight) uncovered for a few days and see if the spots fade.
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