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Old 09-22-2021, 08:03 PM   #1
pwdcougar
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painting over 5 year old epoxy

5 years ago did the bodywork on my Suburban doors and painted them with Nason epoxy primer. For finishing it off all it should need is a coat of 2K primer and some blocking. How should the Nason epoxy be prepped for recoating. It's been 5 years since these were last worked on. I know the 5 year old epoxy has to be sanded or scuffed but with what grit? Also should it get a fresh coat of epoxy before applying the 2K? Lately I've been using SPI epoxy and 2K.

Paul
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Old 09-22-2021, 08:09 PM   #2
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Re: painting over 5 year old epoxy

i had some parts that were done over a yr before with epoxy..i just hit it with 180 and then sprayed the highbuild on...my cabs been in epoxy for over 2yrs..getting ready to hit it as well
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Old 09-22-2021, 08:15 PM   #3
pwdcougar
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Re: painting over 5 year old epoxy

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Originally Posted by mongocanfly View Post
i had some parts that were done over a yr before with epoxy..i just hit it with 180 and then sprayed the highbuild on...my cabs been in epoxy for over 2yrs..getting ready to hit it as well
Thanks!
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Old 09-23-2021, 08:28 AM   #4
JJH Jimmy
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Re: painting over 5 year old epoxy

I would block the Nason with 180 and then a coat of SPI epoxy. Wait 48 hours and then spray your 2K.
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Old 09-23-2021, 10:43 PM   #5
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Re: painting over 5 year old epoxy

SPI recommends sanding then recoating with epoxy if it's been on there that long.
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Old 09-25-2021, 04:04 PM   #6
pwdcougar
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Re: painting over 5 year old epoxy

Quote:
Originally Posted by JJH Jimmy View Post
I would block the Nason with 180 and then a coat of SPI epoxy. Wait 48 hours and then spray your 2K.
Thanks Jimmy!
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Old 10-04-2021, 04:29 PM   #7
72c20customcamper
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Re: painting over 5 year old epoxy

Epoxy has a recoat window . After that time you have to sand no matter what you put on over it.
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Old 10-04-2021, 05:20 PM   #8
lupo
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Re: painting over 5 year old epoxy

Sinces your epoxy primer is 5 years old it's possible there may be rust under it

Epoxy primers that use zinc phosphate as an anti-corrosion device are sacrificial. Knock it down with 180, you'll probably go down to bare metal in certain spots, apply at least two coats of your anti-corrosive epoxy and follow it up with your surfacing epoxy and you should be good to go
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