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Why did the factory spray two coats of primer?
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westwoodblue
Posted 2018-09-06 6:29 PM (#569715)
Subject: Why did the factory spray two coats of primer?


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Any one of these cars I have bodyworked, there are always two coats of primer-

The base coating is the red-oxide everyone used back then, which makes sense. But over top of that, there is another coat.
Some have been white, others grey. It's obviously a primer, but why? It's not like the factory sprayed another coat to block
out, the only thing that would have made sense was another coat closer to the enamel color to save on paint. But this additional
layer never seems to be very close to the topcoat.
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uncltank
Posted 2018-09-06 10:47 PM (#569731 - in reply to #569715)
Subject: Re: Why did the factory spray two coats of primer?


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So that's where my primer went! My '57 Dodge didn't get primer on the floors underside or interior.
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miquelonbrad
Posted 2018-09-12 9:02 PM (#570029 - in reply to #569715)
Subject: Re: Why did the factory spray two coats of primer?



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My '57 Chrysler 2 dr got two coats of paint, and the paint code is restamped on the tag from the factory. Either someone screwed up, or an order came in for an identically equipped car, minus the paint choice... only the body has the two coats; all other panels and peices have the correct single coat.
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57chizler
Posted 2018-09-15 11:36 AM (#570143 - in reply to #569715)
Subject: RE: Why did the factory spray two coats of primer?



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westwoodblue - 2018-09-06 3:29 PM

Any one of these cars I have bodyworked, there are always two coats of primer-

The base coating is the red-oxide everyone used back then


Or, could that red oxide be the dip? Did they dip the bodies back then?
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57plymouth
Posted 2018-09-18 4:31 PM (#570322 - in reply to #569715)
Subject: Re: Why did the factory spray two coats of primer?



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Possibly a lighter top coat of primer for a light color paint. The red oxide was there to be the main adhesion base for the top coats. Similar to etching primer over bare steel now.
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1960fury
Posted 2018-09-18 5:13 PM (#570329 - in reply to #570143)
Subject: RE: Why did the factory spray two coats of primer?



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57chizler - 2018-09-15 11:36 AM

westwoodblue - 2018-09-06 3:29 PM

Any one of these cars I have bodyworked, there are always two coats of primer-

The base coating is the red-oxide everyone used back then


Or, could that red oxide be the dip? Did they dip the bodies back then?


In 1960+, they did. It was backed on too. Good stuff, it is like galvanized. I cringe each time I see someone sanding a good body down to bare steel.
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