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#106572 - 11/16/08 06:57 PM painting aluminum
Erik Offline
member

Registered: 08/26/02
Posts: 348
Loc: Maryland
Hello ltns,Im gonna paint an aluminum ext pack frame and I was wondering if anybody could tell me what the best type of paint is and should I use primer? Thanx alot!!

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#106573 - 11/16/08 07:30 PM Re: painting aluminum [Re: Erik]
ajherman Offline
member

Registered: 05/02/06
Posts: 208
Loc: Rock Springs, WY
you should get it powder coated. otherwise use a good etching primer and good quality spray paint for metal. the painted surface will still peal and chip easily though.
_________________________
KD8DYO
www.hikeforacause.wordpress.com

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#106574 - 11/17/08 07:52 AM Re: painting aluminum [Re: ajherman]
dkramalc Offline
member

Registered: 09/19/03
Posts: 1070
Loc: California
Yeah, what he said. I recall that when I painted my aluminum garage door there was a product that I used to clean the door with first (not TSP, but a clear liquid) then a specialized primer for that type of thing. Go to a good paint store (not Home Depot) and get advice and the products from them, or get it powder coated (not sure where you'd do that, though).
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#106575 - 11/17/08 08:19 AM Re: painting aluminum [Re: ajherman]
JAK Offline
member

Registered: 03/19/04
Posts: 2569
You could use a two part epoxy paint. Might be thicker than you want. You can also anodize aluminum black.

Here is a good source of information on working with epoxy and aluminum.
http://westsystem.com/

If you want to get fancy you could use a very thin-walled section of aluminum or perhaps even softwood and then give it a thin coat of epoxy and wrap it in a very light cloth of fibreglass or spectra or something like that. Even hemp, if your into that. Polyester resin will not bond well to aluminum, but epoxy will bond really well, and adjusts to temperature the same as aluminum also I think, and it will seal wood and absorb in about 1/8". Use some very fine wet-dry sandpaper to scuff up critical joints before you epoxy it. Of course you can buy carbon-fibre tubes now in many sizes. I think it would be neat to make a pack-frame out of bone dry spruce or cedar branches sealed with epoxy, maybe fastened together with whipping twine sealed with epoxy. Wouldn't be all that much heavier than aluminum when done, and it might look way cool espcially if it has natural curves and tapers. Wood and natural fibres are fairly competive strength and weight wise once they are dry and sealed, but I don't think any traditional natural resins are quite as good as epoxy though. Softwood and epoxy is a wicked combination.

Here is some food for thought...
http://www.primitiveways.com/pack_frame.html

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#106576 - 11/17/08 08:37 AM Re: painting aluminum [Re: Erik]
chaz Offline
member

Registered: 10/22/07
Posts: 1149
Loc: Tennessee
I agree that powder coating is the way to go. A lot of race cars frames and components are now powder coated. You should be able to find someone in your area that does the work.
_________________________
Enjoy your next trip...

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#106577 - 11/17/08 04:57 PM Re: painting aluminum [Re: dkramalc]
coyotemaster Offline
member

Registered: 03/07/06
Posts: 294
Loc: Arizona
Quote:
get it powder coated (not sure where you'd do that, though).


Metal fabrication shops like here.

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#106578 - 11/18/08 10:26 AM Re: painting aluminum [Re: JAK]
ajherman Offline
member

Registered: 05/02/06
Posts: 208
Loc: Rock Springs, WY
west system is great stuff. my grandfather uses it in his boat restoration projects, and we have used it for a bunch of different marine related projects also.
_________________________
KD8DYO
www.hikeforacause.wordpress.com

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#106579 - 11/23/08 09:17 AM Re: painting aluminum [Re: Erik]
jonnycat Offline
member

Registered: 04/21/05
Posts: 363
Loc: PNW
Aluminum won't rust, and the paint will add unnecessary weight. Entering a beauty contest are you? <img src="/forums/images/graemlins/smile.gif" alt="" />

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#106580 - 11/23/08 02:39 PM Re: painting aluminum [Re: jonnycat]
Earthling Offline
member

Registered: 02/22/03
Posts: 3228
Loc: USA
ROTFLMAO <img src="/forums/images/graemlins/grin.gif" alt="" /> <img src="/forums/images/graemlins/grin.gif" alt="" /> <img src="/forums/images/graemlins/grin.gif" alt="" /> All paint is going to do on a pack frame is get scratched up, and dinged making your pack frame just dingy looking after a few trips <img src="/forums/images/graemlins/smirk.gif" alt="" />
_________________________
PEPPER SPRAY AIN'T BRAINS IN A CAN!

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#106581 - 11/24/08 08:27 AM Re: painting aluminum [Re: jonnycat]
bulrush Offline
member

Registered: 04/19/07
Posts: 132
Loc: Michigan
Quote:
Aluminum won't rust, and the paint will add unnecessary weight. Entering a beauty contest are you? <img src="/forums/images/graemlins/smile.gif" alt="" />

Actually aluminum DOES rust, it just takes 20 years. We had some collapsible aluminum tent poles which, after about 20 years, got bubbly white spots on them and the surface got more rough. We actually had to sand them down once to make them work as the aluminum oxide got in the way of the poles sliding.

It won't rust through but it does get surface oxides on it.

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