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Old 03-19-2012, 06:51 PM
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SPI Epoxy Question

Hi everyone
I've been restoring a 72 Nova, took alot of the car down to bare metal and sprayed the 2 doors ,trunk and 1 fender with PPG shopline Epoxy primer before I found out about SPI.Does anybody know if I can spray the SPI epoxy over the shopline or would it be best to let them alone.


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Old 03-19-2012, 07:40 PM
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Unless you have a need to cover it, you can just leave it alone. However, it is no big deal to sand the Omni and then apply SPI over it. I'm not sure what the window is for recoating Omni epoxy without sanding, but I would feel better sanding it regardless.
I'm no expert but I have sprayed SPI over other brands of sanded epoxy primer with no issues.
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Old 03-20-2012, 04:49 AM
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Epoxy is the most "compatible" coating out there.
It can be sprayed over almost anything as long as it's prepped properly
and clean. Sanding the existing surface first is always good insurance
for adhesion.
So yes, it can be sprayed over anybodys epoxy out there if
done properly.
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