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Plastic drip area around trunk.

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Old Apr 23, 2026 | 12:31 PM
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Default Plastic drip area around trunk.

Hi Folks, I’m on my 3rd C5 but never saw this problem before. I don’t know if it’s fading or what, but no amount of rubbing gets rid of the white ‘stuff’. It sortof ‘ends’ at the targa ‘bar’. Has anyone ever encountered this and if you fixed it, what did you do? Thanks!

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Old Apr 23, 2026 | 03:29 PM
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Looks like unpainted fibreglass composite to me.
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Old Apr 23, 2026 | 08:29 PM
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Originally Posted by Gorn Captain
Looks like unpainted fibreglass composite to me.
Like someone cleaned it with a substance they shouldn't have.

I'd get some kind of black paint compatible with the composite and coat it.
I'd just brush or wipe it on.
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Old Apr 24, 2026 | 12:28 AM
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That is weird. Can say I've not seen that extent of damage/fading there before. I'd definitely look into some kind of painting though.
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Old Apr 24, 2026 | 01:13 AM
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Seems like that’s my only choice.
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Old Apr 24, 2026 | 09:18 AM
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I have the exact same condition. I have tried all sorts of cleaners and treatments with no help. I am now down to painting.
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Old Apr 24, 2026 | 09:44 AM
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Originally Posted by jcj63
I have the exact same condition. I have tried all sorts of cleaners and treatments with no help. I am now down to painting.
Glad I’m not alone.
Not sure if I want to mask it all off and spray it or brush it on, tho’ I still would mask. However since this looks like the ‘opposite’ of a stain, I might try some kind of ‘bumper black’ first.
I’ll post any ‘developments’.
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Old Apr 24, 2026 | 09:55 AM
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Bumper black is one of the treatments I tried. The surface seems really hard and may not allow anything to soak in. Before I paint mine, and I will spray it, I am going to try lightly sanding a small spot and see if that helps something like the bumper black.
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Old Apr 24, 2026 | 11:09 AM
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Looks like someone has used paint stripper on it. Any previous damage or panels/bumper replaced?
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Old Apr 24, 2026 | 11:53 AM
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What is "bumper black"? Paint?

I would use what we call "rocker guard"... rubberized rocker panel/undercoating, brushed on.
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Old Apr 24, 2026 | 05:30 PM
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In any of my three C5s I never had that area look like that. It does almost look like something took the finish off that area. Maybe check with a good body shop that has experience with Corvettes and see what they recommend.
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Old Apr 27, 2026 | 05:12 PM
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I finally tried ‘bumper black’, it basically did nothing. Next is a thorough cleaning and black paint.
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Old Apr 27, 2026 | 08:32 PM
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Satin Clear

After adhesion promoter

Should retain the original look
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Old Apr 27, 2026 | 09:40 PM
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Originally Posted by nitromainia
Satin Clear

After adhesion promoter

Should retain the original look
you think a clear coat will bring the black color?
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Old May 2, 2026 | 09:04 AM
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My 2004 Vert had this issue when I purchased it. Like above, I tried cleaning it....that did nothing. Tried a light sanding.....nope. Tried "Back to Black"...another nope. Then I found "That Black Stuff" satin black trim restorer.....YES!!! I did washed the area, let it dry for a day...does not take much time for water to evaporate here in Tucson....anyways, applied painters tape to the body, removed the truck lid, removed the screws along the sides.
Then it is just a matter of using a small sponge or rag to apply this stuff....WEAR GLOVES..... I let it dry and applied a second coat, which did not make much difference. Looks brand new again.

I put all of this into a thread when I did it a couple of years back. Seach for my name, you'll find the pictures.

Thread was titled: Area around trunk lid when open.....or something like that.

Last edited by LannyL81; May 2, 2026 at 09:12 AM.
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Old May 2, 2026 | 09:37 AM
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Thanks folks. After trying one of those “Back to Black” products with no results, I decided to paint the area with satin black . I think it came out pretty good and it no longer shouts ‘WTH happened to that plastic?”


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Old May 2, 2026 | 09:53 AM
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Definitely looks much better. 😎👍
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