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Firewall Paint

 
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dfmoeller



Joined: 19 Jun 2006
Posts: 60
Location: Austin, TX

PostPosted: Mon Jan 05, 2015 1:49 pm    Post subject: Firewall Paint Reply with quote

What are peoples thoughts on painting the galvanized firewall? What paint, surface prep, etc? Let me know. I'm at that point in my build where I need to paint it if its getting painted!

Doug


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PostPosted: Mon Jan 05, 2015 3:09 pm    Post subject: Firewall Paint Reply with quote

Hello, Doug

You are going to get one opinion per builder...
I had mine powder coated. I probably posted a picture in zenith.aero.


Carlos
On 5 January 2015 at 16:49, dfmoeller <dfmoeller(at)att.net (dfmoeller(at)att.net)> wrote:
[quote]--> Zenith-List message posted by: "dfmoeller" <dfmoeller(at)att.net (dfmoeller(at)att.net)>

What are peoples thoughts on painting the galvanized firewall?  What paint, surface prep, etc?  Let me know.  I'm at that point in my build where I need to paint it if its getting painted!

Doug




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BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 738

PostPosted: Mon Jan 05, 2015 6:27 pm    Post subject: Firewall Paint Reply with quote

Doug:
You have a real problem there...
A galvanized surface creates an oxidation that prevents rust and paints from getting a foot hold.
You could lightly scuff the surface.  Then wash it down immediately with MEK. Followed by an immediate coating of self etching epoxy primer.  Then a sealing coat of some other epoxy paint.  How long will this paint job last?  I don't know.
OR you could lightly scuff the surface.  Then wash it down with MEK.  Then give it a spray coat of COLD GALVANIZE spray paint.  Only available color - Gray.  How long will this paint job last?  I don't know.
What should have happened would be - Scrap the galvanized steel and replace it with a 300 series stainless steel (302 or 304).  And don't paint it.  This way you have corrosion protection and a fancy shinny firewall, that will not need painting ever.
Barry
On Mon, Jan 5, 2015 at 4:49 PM, dfmoeller <dfmoeller(at)att.net (dfmoeller(at)att.net)> wrote:
[quote]--> Zenith-List message posted by: "dfmoeller" <dfmoeller(at)att.net (dfmoeller(at)att.net)>

What are peoples thoughts on painting the galvanized firewall?  What paint, surface prep, etc?  Let me know.  I'm at that point in my build where I need to paint it if its getting painted!

Doug




Read this topic online here:

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PostPosted: Tue Jan 06, 2015 2:39 am    Post subject: Firewall Paint Reply with quote

Quote:


What are peoples thoughts on painting the galvanized firewall? What paint, surface prep, etc? Let me know. I'm at that point in my build where I need to paint it if its getting painted!

Doug

How about using an intumescent paint ?

http://contegointernational.com/industries/aerospace-aviation/

Christoph Steiner


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BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 738

PostPosted: Tue Jan 06, 2015 8:40 am    Post subject: Firewall Paint Reply with quote

Why Chris?
1 - The firewall is already metal.
2 - You are not going to get any better fire protection than the metal.
3 - The problem is not fire proofing - It is ADHERENCE to the metal.  
4 - You would have to do experiments to prove out the temperature range of the paint and the operation conditions.
5 - Since there is an expansion to this paint - Would the expansion cause a loss of bonding?
6 - What happens to the paint AFTER it expands?  Does it return 100% back to its original size and bond strength? Which reflects back to Item #3.
Too many variables.  The K.I.S.S.  M.E. part of this build has already passed.  What has to be addressed now is Adherence - Corrosion Protection and Looks.
Barry


On Tue, Jan 6, 2015 at 5:38 AM, Christoph Steiner <mcr01steiner(at)mac.com (mcr01steiner(at)mac.com)> wrote:
[quote]--> Zenith-List message posted by: Christoph Steiner <mcr01steiner(at)mac.com (mcr01steiner(at)mac.com)>


> --> Zenith-List message posted by: "dfmoeller" <dfmoeller(at)att.net (dfmoeller(at)att.net)>
>
> What are peoples thoughts on painting the galvanized firewall?  What paint, surface prep, etc?  Let me know.  I'm at that point in my build where I need to paint it if its getting painted!
>
> Doug

How about using an intumescent paint ?

http://contegointernational.com/industries/aerospace-aviation/

Christoph Steiner

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PostPosted: Tue Jan 06, 2015 9:32 am    Post subject: Firewall Paint Reply with quote

Doug,
I myself would choose not to paint the firewall
at all. The environment is quite protected from anything corrosive, unless
you firewall mount the battery, which would require special consideration. I
expect the galvanizing will look decent for a long time as is, certainly
much better than curls of peeling paint, which I consider very possible if
not likely.

Lynn Dingfelder Corry, PA. 601XL-b Corvair

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Tim Juhl



Joined: 21 Mar 2006
Posts: 488
Location: "Thumb" of Michigan

PostPosted: Tue Jan 06, 2015 12:21 pm    Post subject: Re: Firewall Paint Reply with quote

I didn't paint the firewall, just the aluminum pieces that attach to it. The side facing into the cockpit is covered with an aluminized firewall blanket.

Tim


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PostPosted: Tue Jan 06, 2015 2:58 pm    Post subject: Firewall Paint Reply with quote

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Hey, Barry---I have long understood the meaning of k.I.S.S. (understood, but generally not followed,) but what does the addition of M.E. stand for?

Chris--- Don't bother to paint the firewall; it's not worth the effort.

Paul R.
[quote] ---


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BARRY CHECK 6



Joined: 15 Mar 2011
Posts: 738

PostPosted: Thu Jan 08, 2015 11:01 am    Post subject: Firewall Paint Reply with quote

Paul:
The way I learned it some 50+ years ago was:
Keep It Simple Stupid - Make it Easy.
I guess the 'it' part never made it into the anachronism...  Maybe that was just a part of Keeping it Simple Wink
Barry
, Jan 6, 2015 at 5:58 PM, <paulrod36(at)msn.com (paulrod36(at)msn.com)> wrote:
[quote] Hey, Barry---I have long understood the meaning of  k.I.S.S. (understood, but generally not followed,) but what does the addition of M.E. stand for?
 
    Chris--- Don't bother to paint the firewall; it's not worth the effort.
 
Paul R.
[quote] ---


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PostPosted: Thu Jan 08, 2015 1:29 pm    Post subject: Firewall Paint Reply with quote

Leave it bare. It won’t rust, there’s no paint that might burn off and it’s easier to inspect for cracks and such.
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus re-drive.

Quote:
On Jan 5, 2015, at 4:49 PM, dfmoeller <dfmoeller(at)att.net> wrote:



What are peoples thoughts on painting the galvanized firewall? What paint, surface prep, etc? Let me know. I'm at that point in my build where I need to paint it if its getting painted!

Doug




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bryanmaxmartin(at)yahoo.c
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PostPosted: Thu Jan 08, 2015 1:32 pm    Post subject: Firewall Paint Reply with quote

I didn’t paint anything on the engine side. I glued an insulating blanket on the cabin side to help keep the heat and noise out.


--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus re-drive.

Quote:
On Jan 5, 2015, at 4:49 PM, dfmoeller <dfmoeller(at)att.net> wrote:



What are peoples thoughts on painting the galvanized firewall? What paint, surface prep, etc? Let me know. I'm at that point in my build where I need to paint it if its getting painted!

Doug




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paulrod36(at)msn.com
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PostPosted: Thu Jan 08, 2015 2:45 pm    Post subject: Firewall Paint Reply with quote

<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Got it. If I ever make anything simple, I'll use that. Thangya, thangya verr mush.....
[quote] ---


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