The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Paint & Bodywork

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-22-2021, 08:03 PM   #1
pwdcougar
Registered User
 
pwdcougar's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,302
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
__________________
"You know that little thing in your head that keeps you from saying things you shouldn't? Yeah well, I don't have one of those"
1969 Mercury Cougar Standard 4 speed
1969 Mercury Cougar XR7 convertible
1970 4WD Chevrolet Suburban
1997 4WD Chevrolet Silverado Extended Cab Short Bed (purchased new January 1997)
pwdcougar is offline   Reply With Quote
Old 09-22-2021, 08:09 PM   #2
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
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
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 09-22-2021, 08:15 PM   #3
pwdcougar
Registered User
 
pwdcougar's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,302
Re: painting over 5 year old epoxy

Quote:
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!
__________________
"You know that little thing in your head that keeps you from saying things you shouldn't? Yeah well, I don't have one of those"
1969 Mercury Cougar Standard 4 speed
1969 Mercury Cougar XR7 convertible
1970 4WD Chevrolet Suburban
1997 4WD Chevrolet Silverado Extended Cab Short Bed (purchased new January 1997)
pwdcougar is offline   Reply With Quote
Old 09-23-2021, 08:28 AM   #4
JJH Jimmy
Senior Member

 
JJH Jimmy's Avatar
 
Join Date: Jun 2012
Location: Schoolcraft, Michigan
Posts: 921
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.
__________________
1972 GMC Jimmy 4x4 LS Swap
1985 Chevy K20
1994 GMC Yukon
2021 GMC 2500HD Duramax AT4

My "It's a Jimmy Thing" Build
http://67-72chevytrucks.com/vboard/s...d.php?t=583528
Budget Build 1985 K20
http://67-72chevytrucks.com/vboard/s...d.php?t=801565
JJH Jimmy is offline   Reply With Quote
Old 09-23-2021, 10:43 PM   #5
theastronaut
Registered User
 
theastronaut's Avatar
 
Join Date: May 2011
Location: Anderson SC
Posts: 3,867
Re: painting over 5 year old epoxy

SPI recommends sanding then recoating with epoxy if it's been on there that long.
theastronaut is offline   Reply With Quote
Old 09-25-2021, 04:04 PM   #6
pwdcougar
Registered User
 
pwdcougar's Avatar
 
Join Date: Oct 2013
Location: New Jersey
Posts: 1,302
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!
__________________
"You know that little thing in your head that keeps you from saying things you shouldn't? Yeah well, I don't have one of those"
1969 Mercury Cougar Standard 4 speed
1969 Mercury Cougar XR7 convertible
1970 4WD Chevrolet Suburban
1997 4WD Chevrolet Silverado Extended Cab Short Bed (purchased new January 1997)
pwdcougar is offline   Reply With Quote
Old 10-04-2021, 04:29 PM   #7
72c20customcamper
Registered User
 
72c20customcamper's Avatar
 
Join Date: Jul 2018
Location: Catskill Mountains,NY
Posts: 8,053
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.
__________________
Mark
72 c20 custom camper Husky edition,
66 SS396 Chevelle 1964 Hawk, 63 Avanti,62 lark
1969 AMX ,
1968 c20 stepside ,85 K20
1977 Suburban sold
68 anniversary.
72c20customcamper is offline   Reply With Quote
Old 10-04-2021, 05:20 PM   #8
lupo
Registered User
 
Join Date: Aug 2019
Location: usa
Posts: 184
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
lupo is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 07:38 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com