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#1
May 20th 07, 03:44 PM
posted to rec.aviation.homebuilt
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Requirement to paint over 2-part epoxy?
I know that primer(over steel) is designed to provide a base for a top
coat, and (allegedly) you should not leave steel with only a zinc chromate coating (although I've seen steel fuselages zinc chromated only and they appear in good condition). I have read that if you appy a 2-part epoxy primer, you don't need a top coat. Anyone else read that? - Mike 
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#2
May 21st 07, 01:35 AM
posted to rec.aviation.homebuilt
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Requirement to paint over 2-part epoxy?
On May 20, 8:44 am, Michael Horowitz wrote:
I know that primer(over steel) is designed to provide a base for a top coat, and (allegedly) you should not leave steel with only a zinc chromate coating (although I've seen steel fuselages zinc chromated only and they appear in good condition). I have read that if you appy a 2-part epoxy primer, you don't need a top coat. Anyone else read that? - Mike If you like the color of the primer then a top coat will only add extra weight. IMHO Ben
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#3
May 21st 07, 04:26 AM
posted to rec.aviation.homebuilt
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Requirement to paint over 2-part epoxy?
In article . com,
stol wrote: On May 20, 8:44 am, Michael Horowitz wrote: I know that primer(over steel) is designed to provide a base for a top coat, and (allegedly) you should not leave steel with only a zinc chromate coating (although I've seen steel fuselages zinc chromated only and they appear in good condition). I have read that if you appy a 2-part epoxy primer, you don't need a top coat. Anyone else read that? - Mike If you like the color of the primer then a top coat will only add extra weight. IMHO Ben The paint companies around here (PPG, for instance) say that primers will not protect the steel long-term -- you need to apply a top coat to seal it. Check with a good auto/marine paint company -- they have a wealth of information at their disposal.
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#4
May 29th 07, 11:59 PM
posted to rec.aviation.homebuilt
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Requirement to paint over 2-part epoxy?
I've heard that most primers are porous (maybe not epoxy as much, though)
and will not completely seal as a paint would. "Orval Fairbairn" wrote in message news  In article . com, stol wrote: On May 20, 8:44 am, Michael Horowitz wrote: I know that primer(over steel) is designed to provide a base for a top coat, and (allegedly) you should not leave steel with only a zinc chromate coating (although I've seen steel fuselages zinc chromated only and they appear in good condition). I have read that if you appy a 2-part epoxy primer, you don't need a top coat. Anyone else read that? - Mike If you like the color of the primer then a top coat will only add extra weight. IMHO Ben The paint companies around here (PPG, for instance) say that primers will not protect the steel long-term -- you need to apply a top coat to seal it. Check with a good auto/marine paint company -- they have a wealth of information at their disposal.
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