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1960 - Correct GM under body color???
I recently sand blasted the underside of a 1960 Pontiac Bonneville and found no trace of red oxide primer which I thought to be the standard underbody floor color. The car did appear to have factory undercoating as the undercoating was thick on the body but not on the frame. The only color we could find under the undercoating appeared black with more white prevalent towards the outer area (car is white so this is likely overspray). Can anyone confirm if red oxide would be correct and if GM did something different on factory undercoated cars?
July 24, 2013
I don't know how long your question has been posted and I'm not sure how much help I'll be.
I wish I had the exact answer to give you for your 1960 Pontiac. All I can tell you is my 1951 Chevy wagon has a red oxide primer along
with the undercoat sealant (tar like material). The body was made in Cleveland, Oh and transported to Janesville, Wisconsin for assembly
and that's were it had it's undercoating done to protect it from the harsh winters. But I have since found out that it spent most of it's life in
New Mexico, that's probably why the underside is so well preserved. As for my frame there is no red oxide primer or undercoating,
just the bare metal.
Perhaps by 1960 GM combined the rust preventive with the under coat. You know who you could ask, is the guys at Club Grand Prix at: http://www.clubgp.com
I'm sure they would be able to help you.
Best Of Luck
sources: Club Grand Prix http://www.clubgp.com
July 24, 2013
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