| Paint Primer for aluminium touch-up [message #162867] |
Tue, 13 March 2012 11:46  |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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My 76 Palm Beach had been painted years before I bought it. There is corrosion and peeling paint on the aluminium above the stainless steel rub rail that I would like to clean up.
In the 60's all our Marine Corps airplane aluminium fuselage parts were primed with zinc chromate berore painting.
Has anything new been developed for priming raw aluminium in the past 50 years?
I'm not looking to make a show quality paint job; I just want to stop the corrosion and not have the new paint peeling off in the next 10 years.
I will also be painting aluminium window frames which have some bare spots.
All suggestions will be appreciated.
Thanks
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: Paint Primer for aluminum touch-up [message #162868 is a reply to message #162867] |
Tue, 13 March 2012 11:55  |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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I won't comment on the primer but Zinc has always been a good choice. I had that problem after a repaint. Make sure you put some kind of material between the stainless strip and the body to keep it from happening again after you fix it.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: Paint Primer for aluminium touch-up [message #162880 is a reply to message #162867] |
Tue, 13 March 2012 16:18 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Has anyone ever tried stripping the aluminum down and polishing it (ala Airstreams)? Might make for an interesting look, though you'd have to do something different for the front and rear caps.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: Paint Primer for aluminium touch-up [message #162891 is a reply to message #162876] |
Tue, 13 March 2012 19:22 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Randy,
What exactly failed? Etching primer bonding to bare aluminum or paint bonding to the primer?
I bought 3 different primers today. Their clames are:
Sem self etching primer(adheres to autobody steel and aluminum)
Rust-oleum self etching primer (prepares bare metal, aluminum and fiberglass surfaces to promote maximum adhesion)
Rust-oleum Professional Aluminum Primer(for use on bare aluminum)
Any one have any experience with any of these products?
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: Paint Primer for aluminium touch-up [message #162912 is a reply to message #162867] |
Tue, 13 March 2012 21:27 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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I carefully prepped the surface and then used SEM Self-Etching Primer with a Enamel Topcoat and the primer peeled up in less than 3 months. Maybe an Alodine and topcoat with Aluma grip but powdercoat would be easier. If POR15 had UV protectant, I'd use that. It never peels off anything, no matter how much you wish it would!
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] Paint Primer for aluminium touch-up [message #163032 is a reply to message #162922] |
Thu, 15 March 2012 06:16 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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When we painted airplanes, after strip and clean, we etched witrh phosphoric acid and then used AlumiGrip <tm> wash primer. Top it with AlumiGrip paint and you get a good looking product which will withstand raindrops at 500MPH. Which nobody but JimK is going to get one to go that fast, but it's nice to know if you did....
--johnny
'76 23' transmode norris
'76 palm beach
From: Jp Benson <chocomo99@yahoo.com>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Tuesday, March 13, 2012 10:46 PM
Subject: Re: [GMCnet] Paint Primer for aluminium touch-up
I've used phosphoric acid to etch aluminum for painting. It seems to work OK but I don't know how it compares to other treatments. Home depot sells it as Prep & Etch.
Paul
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Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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