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bertrv6(at)gmail.com
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 Posted: Fri Apr 13, 2007 6:27 pm Post subject: Priming & sealing Cowling |
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Hi:
Still waiting to hear from the list, as to the best way to seal, and prime
Cowling, to be ready for paint.
Recently I hear one can buy some product at Waltmart, that works
well for Fibe Glass Cowling... I could not find any thing like that..
What have the list, used to seal the cowling, and what kind or primer.
Am I correct in saying, that one must First Seal , then add primer?
Or by adding special kind of primer, would do both?
I know that Van's said use Epoxy mix with Acetone, 50/50
If one do that, then, what, just paint? no primer?
If not then I am sure it has to be sanded, before anything will
adhere there..
And sanding, that mixture, is no an easy job, I have seen it.....
I really need clarification, with specifics... names brands etc..
Would be appreciate, your comments.
Bert
rv6a
Do Not archive
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Larry Bowen
Joined: 09 Jan 2006
Posts: 802
Location: NC, USA
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| Posted: Fri Apr 13, 2007 7:46 pm Post subject: Priming & sealing Cowling |
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So can I assume you are going to do the finish painting yourself too? Perhaps contact the supplier of the paint you plan to use -- they surely have recommendations on filler and primer to use with their top coats.
--
Larry Bowen
Larry(at)BowenAero.com (Larry(at)BowenAero.com)
http://BowenAero.com
On 4/13/07, Bert Murillo <bertrv6(at)gmail.com (bertrv6(at)gmail.com)> wrote:[quote] --> RVSouthEast-List message posted by: "Bert Murillo" <bertrv6(at)gmail.com (bertrv6(at)gmail.com)>
Hi:
Still waiting to hear from the list, as to the best way to seal, and prime
Cowling, to be ready for paint.
Recently I hear one can buy some product at Waltmart, that works
well for Fibe Glass Cowling... I could not find any thing like that..
What have the list, used to seal the cowling, and what kind or primer.
Am I correct in saying, that one must First Seal , then add primer?
Or by adding special kind of primer, would do both?
I know that Van's said use Epoxy mix with Acetone, 50/50
If one do that, then, what, just paint? no primer?
If not then I am sure it has to be sanded, before anything will
adhere there..
And sanding, that mixture, is no an easy job, I have seen it.....
I really need clarification, with specifics... names brands etc..
[b]
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Larry Bowen
RV-8 SOLD,
RV-7QB in progress... |
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Steve Glasgow
Joined: 10 Jan 2006
Posts: 674
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| Posted: Sat Apr 14, 2007 2:24 am Post subject: Priming & sealing Cowling |
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I recommend 410 microlight from West Marine as a first step.
Cappy
[quote] ---
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Steve Glasgow-Cappy
Cappy's Toy
RV-8 N123SG |
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Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
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| Posted: Sat Apr 14, 2007 6:05 am Post subject: Priming & sealing Cowling |
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Bert, I'll try to help. I just finished doing this using West Systems
epoxy resin.
When preparing the cowl for painting, two things must be accomplished. 1,
fill all the pin holes. 2, Build up the surface of the fiberglass with
something so that the fiberglass cloth pattern does not show thru the paint.
Especially if the final color will be a dark color.
The first coat of epoxy resin was with no filler and thinned with solvent as
Van's recommends. It was applied with a plastic card (like and old credit
card or hotel pass key) used like a scraper. Just pour on some of the mixed
resin and spread it around the cowl surface with the card laying almost flat
to the surface so that it pushes the resin into the pin holes. Then using
the card, scrape the fiberglass surface to remove all of the excess resin.
(Any excess mixed resin can be applied to the inner surfaces of the cowl to
seal it).After a day or so of drying, lightly sand the surface with #80
aluminum oxide sand paper to remove only the high points on the surface.
Wash the sanding dust off, let it dry well and prepare for the next coat of
resin.
The second coat of resin was not thinned with solvent and had no filler but
applied in the same way. Again sand with the #80 paper after resin has dried
for a day or so. (If the epoxy resin tends to stick to the sand paper rather
than coming off as dust, the resin has not sufficiently cured.)
The first two coats of resin filled the pin holes but more is needed to
build up the surface so that the cloth pattern is covered. To do this I
changed the application method as it is difficult to get a uniform film of
wet resin on the surface without scraping all the resin off using the
plastic card. I used a four inch small diameter paint roller used for smooth
surfaces. You can purchase the paint roller from home supply or paint
stores. ( I found I could use the roller for multiply coats if you clean it
well with lacquer thinner immediately after use. Put some thinner in a metal
pan and roll the roller back and forth to purge the resin from the roller.
Wash roller with dish detergent and water and let dry. This cleaning method
will not completely clean all the resin out of the roller but good enough to
use again since you will be sanding the cured resin.) A friend used a foam
type roller instead of a cloth type roller and said it work well but I am
not sure about cleaning a foam roller with solvent.
Sand the cured resin with #100 aluminum oxide sand paper. Continue with
additional coats of resin until the surface is smooth and you can no longer
see the cloth pattern. I put a filler into the third coat of resin to build
the film thickness and make it easier to sand but found it harder to roll
out smoothly so the remaining coats of resin were without filler. The first
coat of paint should be an epoxy sanding primer followed by a sealing epoxy
primer that will also smooth the surface for the final finish coating.
Preparing the fiberglass parts it is a lot work but doing the job properly
will show in the final coating.
Hope this helps. Not saying this is the way you should do it but this worked
for me. If you are going to have the plane painted by a professional, check
with painter. He may do all this for you as part of the paint job.
Dale Ensing
RV-6A
| Quote: | Still waiting to hear from the list, as to the best way to seal, and
prime
Cowling, to be ready for paint.
Bert
rv6a
|
| | - The Matronics RVSouthEast-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
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