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Old 09-30-2004, 11:22 AM
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rust under original primer coat?

Recently my son Matt and I have been working on preping his 75 Nova for a new paint job. The car had the original lacquer paint that folks in this forum told me needed to be removed. So we rolled up our sleeves and attacked. One thing I noticed though was the body (not the fenders) had a brown primer coat that appeared to be sprayed on top of surface rust! Could it have come from the factory with rust on it? We found this surface rust virtually everywhere on the body. The paint was faded but was in otherwise good shape. The primer coat appeared to be solid also?

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Old 09-30-2004, 12:44 PM
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I doubt that it came from the factory that way, but it's probably possible. GM used a grey primer on cars of that time period.

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Old 09-30-2004, 06:56 PM
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No the factory did not paint over rust nor did the body shops that may have replace or repaired some fenders.
What you have is EXACTLY what old lacquer primer and ACID ETCHES do over time. Solvent + Air =Rust.
This was all part of the reasons the paint had lost all its shine.
You can actually chart stages of lacquer deterioration.
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