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Old 01-07-2012, 11:25 AM
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Etching or Epoxy primer

Hey guys
I just blasted my 72 Nova and I asked 2 friends both do body and restoration what primer to use on bare metal one says etching the other said epoxy.Which is better epoxy or etching primer.I've used epoxy to spray some small parts and it's rock hard stuff.The epoxy I have is PPG shopline JP377, have any of you guys used this brand and can anybody tell me the difference between the two.
Also what is a good brand of Bondo.

Thanks

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Old 01-07-2012, 02:07 PM
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Use the epoxy its way better than etch prime. Ppg it a so-so epoxy but should work fine. If you want to up grade next time try some spi epoxy.Any top grade filler is fine most are made by the bigger names and packaged under different names anyway.
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Old 01-07-2012, 04:50 PM
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Another vote for SPI epoxy!
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Old 01-08-2012, 05:48 AM
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I tell ya what have your friends each spray some bare metal with etch and epoxy then set them outside and see which starts rusting first.The etch will take about a week or two...
dont bother waiting for the epoxy to start rusting ,its been on my car 5yrs with no sign of rust at all...
here's another vote for SPI
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Old 01-08-2012, 11:21 AM
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Etch primer was good in its day but it's yesterday's technology. Epoxy is the way to go. It will last longer, protect better and it's today's technology.

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Old 01-08-2012, 08:13 PM
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OK Epoxy it is.Can anybody tell me how much epoxy it would take to prime a 72 Nova completely.Outside,inside,trunk,etc the complete car and how many coats is needed.I have blasted the car with black diamond sand in same areas and it leaves the metal a little rough,is there any need to sand before I prime or can I just shot primer on it. I have blasted some small parts and shot epoxy on them and they turned out looking great but again they were small parts.

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Old 01-09-2012, 07:30 AM
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I'd start with a gallon...The SPI I use is a 1:1 mix ratio so that makes 2 sprayable gallons,2 good wet coats should do it.....
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Old 01-09-2012, 07:52 AM
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SPI Epoxy all the way... You won't find anything better..
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Old 01-22-2012, 05:20 PM
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SPI epoxy vote here too.. Been using it for over 7 years now.. Best one around in my opinion.. Not only can you use it on steel, you can also use it on plastics, fiberglass, urethane's etc etc etc..

Not all epoxies can you do this with.. Many are only good for metal..

BTW I know the thread is a week old or so, but Im surfing the body exterior area
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