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Paul Valovich
Joined: 11 Jan 2006
Posts: 75
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 Posted: Thu Dec 17, 2009 3:02 pm Post subject: Priming Fiberglass |
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I have completed fitting the canopy skirts, cowl, wheel pants and fairing for my -8A. I plan to delay painting until after the plane accumulates some hours. I was going to apply primer to the fiberglass - Sems Self-Etching grey - the same stuff I used on the metal.
However, a VAF poster said that self-etching primer is not to be used on fiberglass. When I then asked for an alternative, I received limited response
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tcone1(at)comcast.net
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| Posted: Thu Dec 17, 2009 3:25 pm Post subject: Priming Fiberglass |
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Paul,
You would be much better off using SEM's high build primer
Tim
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pitts_pilot(at)bellsouth.
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| Posted: Thu Dec 17, 2009 4:44 pm Post subject: Priming Fiberglass |
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I've used all kinds of primer on fiberglass ..... self etching included. I use what I have on hand. My only recommendation is to use the same color primer everywhere unless you use a light colored base coat to cover the airframe. Different shades will show up in the finish coats .... I don't know why, they just do.
Linn
Valovich, Paul wrote: [quote] <![endif]--> <![endif]-->
I have completed fitting the canopy skirts, cowl, wheel pants and fairing for my -8A. I plan to delay painting until after the plane accumulates some hours. I was going to apply primer to the fiberglass – Sems Self-Etching grey – the same stuff I used on the metal.
However, a VAF poster said that self-etching primer is not to be used on fiberglass. When I then asked for an alternative, I received limited response.
How valid is the assertion that selfetching primer doesn’t work on fiberglass. I did apply a single coat to my canopy skirts over a year ago and they seem fine. And can anyone recommend a Sems alternative?
Paul Valovich
Ridgecrest, CA
N192NM Reserved
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mike109g6(at)insideconnec
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| Posted: Thu Dec 17, 2009 10:16 pm Post subject: Priming Fiberglass |
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Regular auto primer. Be careful what you use though depending on what your final color paint is going to be, ie imron, epoxy, waterbased, etc. check for compatibility.
Mike H
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bgray(at)glasair.org
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| Posted: Thu Dec 17, 2009 10:51 pm Post subject: Priming Fiberglass |
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Hold on a minute here. If the parts are made with vinyl ester resin, use a polyester primer. If made with epoxy resin, use an epoxy primer. Do the final primer coat with whatever primer your paint manufacturer recommends. DO NOT SAND OFF ALL THE GEL COAT.
Bruce
www.Glasair.org
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Gary.A.Sobek
Joined: 09 Jan 2006
Posts: 217
Location: SoCAL USA
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| Posted: Fri Dec 18, 2009 4:51 am Post subject: Priming Fiberglass |
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Yes. The primer that you use on the metal should also be applied over the fiberglass primer before you paint. There will be a color miss match if there is a different color primer under the final paint. Most color coats require that the primer be shot within 24-hours before the color coat else sanding is necessary.
Gary A. Sobek
"My Sanity" RV-6 N157GS O-320 Hartzell C
2 C338+ Flying Hours So. CA C USA
From: bgray(at)glasair.org
To: rv-list(at)matronics.com
Subject: RE: RV-List: Priming Fiberglass
Date: Fri C 18 Dec 2009 01:50:06 -0500
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Hold on a minute here. If the parts are made with vinyl ester resin C use a polyester primer. If made with epoxy resin C use an epoxy primer. Do the final primer coat with whatever primer your paint manufacturer recommends. DO NOT SAND OFF ALL THE GEL COAT.
Bruce
www.Glasair.org
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