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#1 |
Registered User
Join Date: Feb 2010
Location: Walnut Grove, Ca
Posts: 216
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Body filler over Epoxy?
I keep looking it up and people swear by it both ways!!
It makes sense because filler would stick better to metal.. But after sanding my bedsides down there are a couple rust spots under previous filler work (they used alot!) SO epoxy under filler makes sense too to keep out moisture... I was hoping to spray the whole thing down today, just finished welding up all the trim holes.. and slowly do my filler here and there when I have time... then put down my high build... then seal and paint What say you guys? thanks in advance. thanks guys.. can a mod move this for me to the proper area please.. also Im using the TCP DTM Epoxy Primer..I know not the most advanced but in my price range. thanks
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66 Gmc 1 ton. Long Step 351e V6 69 1/2 CHEVROLET (now a shortbed) LONGBED! ![]() ![]() 61 Shortbed Fleetside 1/2 ton.. in progress Next a 50-53! MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=447926 Last edited by BadaSs_Cal; 04-07-2011 at 06:09 PM. |
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#2 |
Registered User
Join Date: Sep 2010
Location: Broken Arrow, OK
Posts: 428
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Re: Body filler over Epoxy?
if there was rust under the previous filler, it tells me a) they didn't remove the rust prior to doing the filler work, or b) they left the filler exposed for far too long. Or both... given that they seemed to have just slopped it on in the first place I wouldn't doubt either.
The epoxy primer that I used back in the service was more for adhesion on bare metal than anything else, and went on fairly light, unlike say a "regular" primer. It has some corrosion resistance qualities, but that wasn't it's primary purpose. Same goes for other primers. Most are not designed to protect against moisture for long periods of time. That is what the top coat is designed for.
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Project Bad Karma |
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#3 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Body filler over Epoxy?
I'll bet if you had posted this in the paint and body forum you'd get a lot of input.
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#4 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Body filler over Epoxy?
^ Yep. I've posted in paint and body before. You don't have a lot of visitors but there's a lot of knowledge.
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#5 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,005
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Re: Body filler over Epoxy?
moved.
Posted via Mobile Device
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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#6 |
Registered User
Join Date: Oct 2008
Location: Marianna Arkansas
Posts: 7,270
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Re: Body filler over Epoxy?
I use PPG epoxy primer. The tecsheets say[the best I remember] that you can put the primer on the body filler or put filler on top of the e-primer. I have done it both ways and don't see much difference. Jim
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#7 |
Registered User
Join Date: Sep 2010
Location: los angeles
Posts: 1,132
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Re: Body filler over Epoxy?
I used ppg epoxy primer on bare metal, body filler on top. Next time you're in the junkyard, take a look at the cars where a chunk of bondo has fallen off, and BAM rust underneath.
That primer is nice, thick and hard. |
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#8 |
Senior Member
Join Date: Apr 2000
Location: Delta,Pa
Posts: 14,950
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Re: Body filler over Epoxy?
Epoxy over bare metal. Filler sucks up water like a sponge. Filler over epoxy is fine.
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Owner of North Point Car Care in Dundalk Md. We specialize in custom exhaust on both modern and classic vehicles. We are a full service auto shop from classics to modern vehicles. Feel free to contact me with questions. I will give a 10% discount to any board member. |
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#9 |
Senior Member
Join Date: Jul 2010
Location: South Dakota
Posts: 4,093
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Re: Body filler over Epoxy?
saving
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1969 Chevy c20(Miss Hackjob) |
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#10 |
Registered User
Join Date: Feb 2010
Location: Walnut Grove, Ca
Posts: 216
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Re: Body filler over Epoxy?
so are you guys putting on Bondo right over epoxy that is just dry? The plan was to epoxy the whole thing... and scuff up a little at a time and do some filler here and there while time permits...then use the sealer filler over it... then seal the whole thing.. is that a good idea?
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66 Gmc 1 ton. Long Step 351e V6 69 1/2 CHEVROLET (now a shortbed) LONGBED! ![]() ![]() 61 Shortbed Fleetside 1/2 ton.. in progress Next a 50-53! MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=447926 |
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#11 |
Registered User
Join Date: Mar 2002
Location: Forney TX
Posts: 4,512
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Re: Body filler over Epoxy?
I also use filler over epoxy but make sure it has cured good then scuff enough for mud to bite too. You can't expect anything over an 1/8" to stick long anyway so do your metalwork first then epoxy and mud
Posted via Mobile Device
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Troy 1965 Chevy Bagged,361 sbc,voodoo cam,1.5 full roller rockers,patriot 185cc vortec heads 2.02-1.60,vortec weiand polished intake,demon carb my truckhttp://67-72chevytrucks.com/vboard/s...d.php?t=332884 Big Red Dog build http://67-72chevytrucks.com/vboard/s...d.php?t=572274 |
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#12 |
Account Suspended
Join Date: Aug 2007
Location: USA
Posts: 1,223
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Re: Body filler over Epoxy?
I used SPI epoxy, and they highly recommend Filler over their epoxy. then spray epoxy again over filler. then 2k if needed
![]() Last edited by mrhino; 04-08-2011 at 07:06 AM. |
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#13 |
Registered User
Join Date: Feb 2010
Location: Walnut Grove, Ca
Posts: 216
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Re: Body filler over Epoxy?
Hey your garage is looking like mine! Great looking body work on that gate. The po used resin with duct tape over that to smooth out mine... comes off easy.. but what a nice surprise to find the CHEV letters under there.
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66 Gmc 1 ton. Long Step 351e V6 69 1/2 CHEVROLET (now a shortbed) LONGBED! ![]() ![]() 61 Shortbed Fleetside 1/2 ton.. in progress Next a 50-53! MY BUILD THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=447926 |
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#14 |
Registered User
Join Date: Mar 2007
Location: Connecticut
Posts: 581
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Re: Body filler over Epoxy?
In the collision market filler is usually put directly to the steel, as time/money constraints demand it. But on restorations epoxy primer is often used first, to seal moisture away from the metal, making a longer lasting repair. Epoxy has to cure usually 24 hrs before applying filler over it, but also for the best adhesion to epoxy the filler should be applied within the epoxy re-coat window while it is chemically soft enough for the filler to bond well chemically. But brands will vary and tech sheets need to be read and followed.
I recommend and use SPI brand epoxy. It sands easily, unlike most other brands. Good luck Go here for more info on the use of SPI products: http://www.spiuserforum.com/forum.php And here to purchase SPI: http://www.spiuserforum.com/forum.php
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"I'll Procrastinate Tomorrow" quote by LEEVON 71 K10 long fleet (sons truck) new 370hp 355, sm465 np205, 3.73's 33's 70 K20 long fleet 98 G3500 work van |
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#15 | |
Account Suspended
Join Date: Aug 2007
Location: USA
Posts: 1,223
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Re: Body filler over Epoxy?
Quote:
The crap people do. |
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#16 |
Registered User
![]() Join Date: Nov 2006
Location: Virginia's Eastern Shore
Posts: 91
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Re: Body filler over Epoxy?
Not all body fillers are the same-----some are moistureproof and some not. The most popular and well known filler (which shall remain nameless) is essentially talcum powder mixed in with polyester resin, no barrier to moisture (the "sponge" effect mentioned by Cableguy).
I have had very good results with a product called "All Metal" that is waterproof and seems to bond just about as well as epoxy (got a bit on the very slick chrome of a liftgate handle many years ago and left it to see how well it would stay.........still there completely intact even after I've tried to scrape it off with my fingernail). It cures very hard so is not easy to work, can get a bit brittle if applied too thick without some reinforcement, and is more expensive. It's all I ever use now, but I don't do much body work compared to many of the members on this forum. One thing to keep in mind is that you have to seal the metal from ALL sides to keep moisture and O2 from doing their ugly thing! |
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