Using body filler over primer

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Michael R Cook Michael R Cook's Profile E-mail Michael R Cook Non-Lurker Posts: 1 Joined: Sun Jul 04, 2021 4:49 pm Country: USA	Posted: Sun Jul 04, 2021 4:55 pm What is the latest verdict on using body filler over epoxy primer/ 2k ?
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'68 Coronet R/T '68 Coronet R/T's Profile Board Moderator Posts: 9898 Joined: Fri Oct 20, 2006 12:40 pm Location: ARIZONA	Posted: Sun Jul 04, 2021 10:43 pm Body filler over epoxy is fine. Can be done without sanding if still in the re-coat window. Otherwise you will need to sand the area to provide scratch for the filler. 1968 Coronet R/T ACTS 16:31
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Doright Doright's Profile E-mail Doright Doright's Website Top Contributor Posts: 6235 Joined: Tue Sep 16, 2008 1:17 pm Location: Pahrump NV. Country: USA	Posted: Tue Jul 06, 2021 5:42 pm Best way to do it. Ever strip an old car removing 20+ year old filler and find rust under the filler? I have! Epoxy then filler = No rust under filler 20 years latter! Dennis B. A&P Mechanic, FCC General radio Telephone Operator Line Maintenance A&P Mechanic and MOC Tech specialist.
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JCCLARK JCCLARK's Profile E-mail JCCLARK JCCLARK's Website Top Contributor Posts: 3966 Joined: Wed Sep 07, 2005 9:59 am Location: Louisville, KY Country: USA	Posted: Wed Jul 07, 2021 8:19 am Doright wrote:Ever strip an old car removing 20+ year old filler and find rust under the filler? I have! ! Well there you go, even with a little rust it lasted 20 yrs, When filler done right, either way, it'll outlast the car. JC. (It's not custom painting-it's custom sanding)
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Top Contributor

Posts: 6235
Joined: Tue Sep 16, 2008 1:17 pm
Location: Pahrump NV.
Country: USA

Posted: Wed Jul 07, 2021 10:52 am

JCCLARK wrote:
Doright wrote:Ever strip an old car removing 20+ year old filler and find rust under the filler? I have!
!

Well there you go, even with a little rust it lasted 20 yrs,
When filler done right, either way, it'll outlast the car.

Point being Rust had gotten in between Filler and the metal directly under the filler, probably from the back side. I don't remember as I cut the metal out and replaced it.
I find it like this on most old slide hammer jobs done long ago.
Had it been treated with Epoxy first front and back I don't think it would have happened. I treat the back side of metal panels with Epoxy now as much as feasibly possible.

Dennis B.
A&P Mechanic, FCC General radio Telephone Operator
Line Maintenance A&P Mechanic and MOC Tech specialist.

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