Re: 1990 ZR1 Manifold Signature
back in 1990 and 1991 I had about 8 put their names on it and it was done with black marker. it has nothing over it, looks the same as the day they did it. Car has 31,000 miles.
I only use a damp rag with water to clean the top of motor when it needs it.
I would just leave it as is and it will be fine.
Dean Nelson
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