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Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25204
Location: Livermore CA USA
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 Posted: Sun Sep 20, 2009 7:03 pm Post subject: Painting The Baffling... |
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Dear Listers,
I had been planning on black anodizing the various engine baffling pieces in keeping with my black-n-chrome theme under the hood. But I'm noticing that the pieces are getting pretty scratched up during all of this extra fitting that's necessary for the IO-390. Since the pieces can't be run through a surfacer first because of the bends, I'm rethinking how good anodizing is really going to look.
I know we're not suppose to power coat the 2024-T3 because the curing heat required can un-T3 the 2024, but does it really matter for the baffling? Its not really structural, per say. And if power coating is alright, what effects will the engine compartment heat have on the power coating? There's probably a high-temp power coat, but it would likely require a higher curing temp, and that get's us back to the first sentence of this paragraph... Power coating the baffling would definitely look pretty cool.
Has anyone ever chromed their baffling? That would look super cool. Can you chrome 2024-T3? How much would that cost compared to power coating?
Am I fussing too much under the hood? 
Matt Dralle
RV-8 #82880 N998RV
http://www.mattsrv8.com
FWF Baffling, Intake, and Governor...
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Matt Dralle
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Jim Berry
Joined: 10 Jan 2006
Posts: 237
Location: Denver
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| Posted: Sun Sep 20, 2009 9:29 pm Post subject: Re: Painting The Baffling... |
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Matt,
I can't answer your question about powder coating, but I have experience with painting and anodizing. I painted the baffles on my Pitts with Imron, and they still look good 25 years later. I had a local shop anodize the baffles on my -10 for $75. I did buff out the deepest scratches and tooling marks first with Scotchbrite. None of the marks showed through the anodize.
Jim Berry
40482
N15JB
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rbibb
Joined: 16 Jul 2009
Posts: 37
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| Posted: Mon Sep 21, 2009 3:41 am Post subject: Painting The Baffling... |
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I wouldn't worry about powder coating the baffling for reasons cited. I'm
making modifications to my RV-4 baffling and am using 5052 cause I have some
lying around and it sure is easier to form.
I wouldn't anodize because, over-time you will have to take the stuff off a
couple of times and it will get scratched. At least with paint or powder if
you do scratch it you can touch it up easier than having to send the whole
piece out for re-anodizing. That would get expensive with all the lot
charges.
Richard Bibb
972-771-2598
972-835-5979 mobile
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deej(at)deej.net
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| Posted: Mon Sep 21, 2009 6:19 am Post subject: Painting The Baffling... |
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On 09/20/2009 11:02 PM, Matt Dralle wrote:
| Quote: | Has anyone ever chromed their baffling? That would look super cool. Can you chrome 2024-T3? How much would that cost compared to power coating?
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I've seen chrome colored baffling. I can't tell you if it was
chromed, or just chrome colored paint, but it did indeed look super
cool. 
-Dj
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Dj Merrill - N1JOV
Glastar Sportsman 2+2 Builder #7118 N421DJ - http://deej.net/sportsman/
Grumman Yankee Driver N9870L - http://deej.net/yankee/
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rbibb
Joined: 16 Jul 2009
Posts: 37
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| Posted: Mon Sep 21, 2009 6:50 am Post subject: Painting The Baffling... |
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You can't chrome aluminum....
Richard Bibb
972-771-2598
972-835-5979 mobile
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nukeflyboy
Joined: 05 Jan 2008
Posts: 162
Location: Granbury, TX
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| Posted: Mon Sep 21, 2009 12:00 pm Post subject: Re: Painting The Baffling... |
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I used a clear coat on my RV-6 baffles and 9 flying years later it does not look that good. It has yellowed somewhat and the baffles do move around a bit leaving rub marks. I don't know if paint holds up better but it sounds like it. I recall that it took a lot of persuasion to get the baffles in place, which will scratch any paint. You also need to RTV the gaps. I don't know why you would need to remove the baffles frequently. I have not ever and don't anticipate it for another 10 years.
Whatever you use needs to hold up to bugs and heat. The engine paint does not hold up well either (at least Lycoming gray) so it will look good under the hood for only a short time. Unless you are building a show plane I would not worry much about it. Few people will ever see it.
If you are building a show plane then go nuts (like the rest) and get it gold plated. Or better yet use carbon fibers and make a pressure cowl, then gold plate that. Or better yet write a big check and have someone else do it.
Sorry about that last comment - I could not help myself.
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Dave Moore
RV-6 built and sold
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aerosport1
Joined: 07 Nov 2007
Posts: 231
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| Posted: Mon Sep 21, 2009 12:11 pm Post subject: Painting The Baffling... |
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I powder coated them after they were built. Not my idea but a have seen I
few do this and they look great and seem to hold up well.
Geoff
Geoff Combs
President
Aerosport Modeling & Design
8090 Howe Industrial Parkway
Canal Winchester, Ohio 43110
614-834-5227p
614-834-5230f
www.aerosportmodeling.com
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Geoff Combs
RV-10 QB N829GW
Flying 500 hrs
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drfred(at)suddenlinkmail.
Guest
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| Posted: Mon Sep 21, 2009 2:43 pm Post subject: Painting The Baffling... |
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Matt;
I don't see any reason why the baffling wouldn't hold up being powder
coated. I think it would look cool. It also would be easier to clean
the front dams where they get all bugged up.
It's just money......
Dr Fred.
515FW.
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