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challomoner
Samba Member
Joined: October 13, 2010
Posts: 1215
Location: IRELAND
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 Posted: Mon Feb 27, 2017 10:33 am Post subject: Driving with epoxy primer only |
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I'm looking for some advice on the cons of driving my bug for a few months painted only in epoxy primer. The body will be blasted and epoxy primed then seam sealed. I was hoping maybe I could get away with using it like this for a few months. It'll be garaged when not in use any won't be driven in rain or wet roads.
What are the consequences of this when it comes to painting? Would a good degreasing and scuff be OK to paint on, or will the new paint job suffer? |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Mon Feb 27, 2017 2:53 pm Post subject: Re: Driving with epoxy primer only |
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Nope.
Primer is porous. You will get dirt, dxhaust, oils etc in it....and have spotty adhesion. If you have to keep it from rusting....use the weakest easiest to remove primer you can and plan to strip it chemically when the time comes to paint. Ray |
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theKbStockpiler
Samba Member
Joined: July 07, 2012
Posts: 2316
Location: Rust Belt
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| Posted: Mon Feb 27, 2017 5:20 pm Post subject: Re: Driving with epoxy primer only |
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I believe that Primer/Sealer is meant to take care of the sort comings of regular primer. I have heard of shops using it on a car that is not going to get painted right away.
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Use all safety devices including a mask. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Tue Feb 28, 2017 10:24 am Post subject: Re: Driving with epoxy primer only |
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| theKbStockpiler wrote: |
| I believe that Primer/Sealer is meant to take care of the sort comings of regular primer. I have heard of shops using it on a car that is not going to get painted right away. |
Oh for sure...but not to drive it.
Epoxy...all epoxy regardless of what industry or use... is NOTORIOUSLY poor in UV exposure. Also...if its a primer...regardless if its a primer/sealer combo...has high surface tooth and some porosity.
Getting it out in the sun, rain and pollution and riving it around will be a potential disaster when you paint it because you can NEVER get it clean enough.
I fully understand the issues with time versus funding and the need to drive a car. If its your only car especially. In that case.....paint with cheap primer...do not waste your money on expensive epoxy sealer.....and just preserve and cover the metal until you can get back to it. Then strip the cheap primer and do it right.
If its not your only car....and you just do not have the self control to not drive it....then for sure you neeed to keep cheap primer on it. Ray |
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challomoner
Samba Member
Joined: October 13, 2010
Posts: 1215
Location: IRELAND
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| Posted: Tue Feb 28, 2017 11:16 am Post subject: Re: Driving with epoxy primer only |
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I've had a rethink and I've decided to hold off on the blasting and epoxy primer until I'm ready for full paintjob. In the meantime I'll get it all in one colour with primer and enjoy driving it until next winter.
Thanks for the advice. |
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theKbStockpiler
Samba Member
Joined: July 07, 2012
Posts: 2316
Location: Rust Belt
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| Posted: Tue Feb 28, 2017 6:49 pm Post subject: Re: Driving with epoxy primer only |
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A Urethane sealer would not be effected by UV as much and has more resin than a primer alone. If you use zinc underneath, the zinc will do the rusting and not the metal. http://www.sherwin-automotive.com/fleet-refinishin...d-a-sealer I would use an actual 'Sealer' and not a reduced 'Primer'. Maybe a Self Etching Primer first (has zinc and phosphoric acid) and then cover it with Sealer. I have been using Zinc ,Self Etching Primer followed by Sealer.
_________________
My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Wed Mar 01, 2017 1:34 pm Post subject: Re: Driving with epoxy primer only |
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| theKbStockpiler wrote: |
| A Urethane sealer would not be effected by UV as much and has more resin than a primer alone. If you use zinc underneath, the zinc will do the rusting and not the metal. http://www.sherwin-automotive.com/fleet-refinishin...d-a-sealer I would use an actual 'Sealer' and not a reduced 'Primer'. Maybe a Self Etching Primer first (has zinc and phosphoric acid) and then cover it with Sealer. I have been using Zinc ,Self Etching Primer followed by Sealer. |
Thats a good idea. The real issues with bare primer alone is the microscopic open surface...tooth... that it has.
If you can get something onto it with a gloss...and a urethane will be far better out in the sun....partly because its urethane and partly because it has higher gloss. Higher gloss coatings generally have a fairly well sealed surface. Less chance of absorbing oils and grease.
Ray |
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theKbStockpiler
Samba Member
Joined: July 07, 2012
Posts: 2316
Location: Rust Belt
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| Posted: Wed Mar 01, 2017 2:16 pm Post subject: Re: Driving with epoxy primer only |
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If I'm doing a spot repair or welding in a patch ,I have to use some sort of putty (usually a two part glazing putty) so I'm not relying on primer to fill anything. A few professionals recommended Sealer as imperative to stopping rust so I have been using Duplicolor sold at walmart before some sort of a base. It basically resembles a semi gloss white paint, is smooth and hard unlike a primer. It seems thin but does not have a tendency to run. 
_________________
My beetle is not competing with your beetle. I have the yellow beetle in my town. There is a red one, a green one ......
Use all safety devices including a mask. |
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vwkirb
Samba Member
Joined: January 16, 2007
Posts: 812
Location: Athens, GA
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| Posted: Fri Mar 03, 2017 6:36 pm Post subject: Re: Driving with epoxy primer only |
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Masterseries is moisture cured urethane, that can brusehed or sprayed. It is pigmented with aluminum flake and is UV resistant.
It can be applied directly to prepped metal and with two coats and the surface is sealed.
I've been using it on my car, the areas i've used it seem perfectly happy in all weather living outside.
http://www.masterseriescoatings.com/index/products/ag111/ |
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raygreenwood
Samba Member
Joined: November 24, 2008
Posts: 21519
Location: Oklahoma City
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| Posted: Fri Mar 03, 2017 6:54 pm Post subject: Re: Driving with epoxy primer only |
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| vwkirb wrote: |
Masterseries is moisture cured urethane, that can brusehed or sprayed. It is pigmented with aluminum flake and is UV resistant.
It can be applied directly to prepped metal and with two coats and the surface is sealed.
I've been using it on my car, the areas i've used it seem perfectly happy in all weather living outside.
http://www.masterseriescoatings.com/index/products/ag111/ |
Absolutely awesome stuff....but thats not a primer....which is what he was asking about.
He is having a lot of body work done now.....and wants to cover it with primer and drive it around until he paints in monyhs later.
If you painted the car with that product.....you will not easily get it off later when its time to paint....and its NOT a primer.
Ray |
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vwsplitman
Samba Member
Joined: June 18, 2003
Posts: 322
Location: Plymouth, CT
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| Posted: Sat Mar 04, 2017 12:36 pm Post subject: Re: Driving with epoxy primer only |
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Hate to disagree about the MasterSeries. Ive used it for 25 plus years as a primer. And so do a lot of body shops. I do a complete VW body with the stuff and off to the paint shop it goes. They scuff it up , do their filler work , put their primer over it and then topcoat. We have found that any paint can go over it as a topcoat. It is an excellent primer. Can be sanded quite nicely. Now if someone doesn't want to do the scuffing, we tell them to apply a dusting of their primer when the 2nd coat is almost dry and the two will bind together nicely. Then the next day a heavier coat of their primer.
And you would not want to take it off. It has over 40% aluminum flake in it and totally different than the other paint over rust paints. I have samples that have been outside over 15 years with 3 coats of the MS silver primer/sealer with no issues. Not pushing the product but just making some info available on the material.
Chuck P MasterSeriesCT.com |
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estilholliday
Samba Member
Joined: November 07, 2013
Posts: 54
Location: Delaware
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| Posted: Tue Jan 08, 2019 9:09 pm Post subject: Re: Driving with epoxy primer only |
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| no one mentioned how awesome its gonna look being primer. especially if its the light grey stuff and only on a few spots of the car. |
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Mellow Yellow 74
Samba Member
Joined: October 14, 2014
Posts: 1615
Location: Sydney, Australia
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| Posted: Fri Jan 11, 2019 1:43 am Post subject: Re: Driving with epoxy primer only |
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| raygreenwood wrote: |
| Primer is porous. You will get dirt, dxhaust, oils etc in it....and have spotty adhesion. |
Two pack epoxy is not porous
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sovereignsamba
Banned
Joined: March 06, 2004
Posts: 2845
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| Posted: Sat Feb 02, 2019 12:43 am Post subject: Re: Driving with epoxy primer only |
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| Spray a thin coat of mek primer over it to keep the sun from damaging. Mek can be easily sanded off before more.body work. |
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Bulli Klinik
Samba Member
Joined: January 16, 2005
Posts: 2079
Location: Bulli Klinik, Colorado Springs
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| Posted: Fri Feb 08, 2019 9:07 am Post subject: Re: Driving with epoxy primer only |
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You're not going to have a problem with an epoxy primer. When it comes time to paint, scuff it and use wax remover/de-greaser.
If the bodywork is already done, shoot a couple coats of poly-primer over the epoxy then block it once it's gassed out.
Epoxy is tough stuff and non-porous.
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Bulli Klinik
Colorado Springs |
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