1992 Paint Discoloration Under Hood

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Chrispy62

Member

Aug 9, 2023

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Brooklyn, NY

Dec 14, 2023

#1

• Dec 14, 2023

• #1

My 1992 5.0 LX is pristine with 62k miles, always garaged a true survivor 100% original Titanium Frost factory paint.
The only issue I have is discoloration under the hood on the radiator support and around both sides under the fender mounting bolts
I was told that this occurs over time due to a rust inhibitor that was sprayed at the factory.
Can anyone confirm this and possibly recommend something to clean it off without harming the paint?
Thanks!
Chris

 

Mstng93SSP

You have a nice rear end there Dave.

15 Year Member

Nov 29, 1999

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Dec 14, 2023

#2

• Dec 14, 2023

• #2

Can you post pictures? Are you talking about rustproofing spray or just faded paint? If it is undercoating/rustproofing there are companies that use dry ice to remove it.

 

C

Chrispy62

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Aug 9, 2023

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Dec 14, 2023

#3

• Dec 14, 2023

• #3

It's definitely not the paint fading.
I'm out of town until 12/26, I'll post a picture then.
Any more info on how dry ice is used?
Thanks!

 

C

Chrispy62

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Brooklyn, NY

Dec 14, 2023

#4

• Dec 14, 2023

• #4

 

C

Chrispy62

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#5

• Dec 14, 2023

• #5

Here's a picture

 

C

Chrispy62

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Brooklyn, NY

Dec 14, 2023

#6

• Dec 14, 2023

• #6

Can anyone recommend a mild chemical that could remove this discolored factory rust inhibitor?
It's really yellowed over the years ( see above picture) and as the rest of the car is perfect, really needs to be taken care of!
Thanks!

 

85GTStangGuy

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May 19, 2021

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Dec 14, 2023

#7

• Dec 14, 2023

• #7

I'd try wax & grease remover first... though I really don't think it's gonna work.... it's just where I'd start. If that doesn't cut it, I'd try mineral spirits next.

 

C

Chrispy62

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Brooklyn, NY

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#8

• Dec 14, 2023

• #8

Thanks!

 

General karthief

wonder how much it would cost to ship you a pair

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polk county florida

Dec 14, 2023

#9

• Dec 14, 2023

• #9

Removing/treating the discoloration depends on what it is, wax and grease remover is a good place to start, likely not to harm the paint, though it will remove the factory markings most times.
I've not heard anything about a factory/dealer treatment applied on top of paint but I'm just just a back yard hack.

 

C

Chrispy62

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#10

• Dec 14, 2023

• #10

Thanks