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Old 09-15-2015, 12:54 PM   #1
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1974 27' Overlander
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Clarification on exterior shell material?

I have a '74 Overlander that I'm doing a shell off resto on. The shell is back on now, but I haven't started the interior re-install yet. In the back of my mind, I'd always planned on polishing, but now that's moved to the front. It seems to make sense to do the polishing now, when I can remove all the trim that would be in the way when polishing. I know, maybe a bit over the top, but I never could do things the easy way .

Anyway, I'm still a little unclear as to exactly what the exterior skin is on this AS. I've read that in the early '70's, AS "experimented" with 6061, then switched to a different alloy in the late '70's. Does anyone know where the dividing line is? And more importantly, was it still alclad? Two reasons for the latter question, polishing is one, of course, but I also have some patching to do, and there's no reason to pay for alclad if I don't need it. Thanks in advance.

Dave
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Old 09-15-2015, 03:36 PM   #2
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Have a look at post #2 of this thread. The document came from Airstream, so it is about as reliable as anything.

http://www.airforums.com/forums/f381...oy-136830.html

If you have a '74 then according to this history, you probably have a shell made of 6061 T6. An Alclad version of the 6061 is available from metal suppliers, but it is unclear to me whether the 6061 used by AS was the Alclad version or not. That being said, I have seen plenty of polished 70's era trailers that shine like a mirror. And that being said, if I squint with my calibrated eyeball, I can tell the difference between a '69 and a '73 (or at least I think I can).

There are plenty of folks out there that think they have 70's trailers made of 2024-T3 Alclad, so another question is, when AS says they "experimented," is it like the experimentation that goes on at liberal arts colleges, (where it is weird, and only happens here and there), or was their experimentation really full-on laboratory research (the norm, not the exception)?

good luck!
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Old 09-17-2015, 11:52 AM   #3
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HELP! HELP! HELP! I've just had my beloved 1958 Airstream Traveler WRECKED by a) my own stupidity in thinking that Hand Wash centres in the UK are as good as each other...and b) by the worst one squirting NEAT TFR (Traffic Film Remover-almost acid!) all over my Airstream. It's left indelible streaks all over it. PLEASE can someone out there tell me the best way to remove these marks and then the best protector to add afterwards? Another excellent centre here recommended polishing a thin layer of the metal off as NOTHING else would touch these streaks...but is that the right answer? I've spent 18 months lovingly restoring 'Georgia' and can't tell you how gutted I am. HELP! Alison
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Old 09-17-2015, 12:41 PM   #4
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Originally Posted by Ali Daw View Post
HELP! HELP! HELP! I've just had my beloved 1958 Airstream Traveler WRECKED by a) my own stupidity in thinking that Hand Wash centres in the UK are as good as each other...and b) by the worst one squirting NEAT TFR (Traffic Film Remover-almost acid!) all over my Airstream. It's left indelible streaks all over it. PLEASE can someone out there tell me the best way to remove these marks and then the best protector to add afterwards? Another excellent centre here recommended polishing a thin layer of the metal off as NOTHING else would touch these streaks...but is that the right answer? I've spent 18 months lovingly restoring 'Georgia' and can't tell you how gutted I am. HELP! Alison
O my dear. I am SO sorry that happened to you. I'm not a restorer so I'll defer to those who are - but I fear that the person who recommended polishing may be right.

They say we Yanks are too fond of litigating - and I am going to prove it by strongly urging you to sue the pants off of that car wash. How could they use that kind of strong chemical without at least doing a test spot in an inconspicuous place? The labor (labour) of repolish your Airstream has got to be significant. I don't know how to express it in Euros or Pounds. but $100 USD per linear foot isn't unheard of in the states.

Paula
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Old 09-17-2015, 02:40 PM   #5
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Originally Posted by Belegedhel View Post
Have a look at post #2 of this thread. The document came from Airstream, so it is about as reliable as anything.

http://www.airforums.com/forums/f381...oy-136830.html

If you have a '74 then according to this history, you probably have a shell made of 6061 T6. An Alclad version of the 6061 is available from metal suppliers, but it is unclear to me whether the 6061 used by AS was the Alclad version or not. That being said, I have seen plenty of polished 70's era trailers that shine like a mirror. And that being said, if I squint with my calibrated eyeball, I can tell the difference between a '69 and a '73 (or at least I think I can).

There are plenty of folks out there that think they have 70's trailers made of 2024-T3 Alclad, so another question is, when AS says they "experimented," is it like the experimentation that goes on at liberal arts colleges, (where it is weird, and only happens here and there), or was their experimentation really full-on laboratory research (the norm, not the exception)?

good luck!
Please post a photo or 2, about 3 feet away from those streaks.

Andy
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Old 09-19-2015, 10:12 AM   #6
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Thanks, Belegedhel, I'd seen that chart already, which is what brought up my question. "Experimented" is the problem, you nailed it with the liberal arts college example . That, and the chart just says 6061-T6, no mention of Alclad. I know I can source Alclad 6061, although it's not as common as 2024 Alclad, it is cheaper. But if my trailer isn't Alclad anyway, bare 6061 is cheaper yet, and available locally, although I have a pretty good stock on hand. So I guess the real question should have been, Alclad or not?

Andy, do you have any input here? You quoted my post, but answered the other guy's question . Or should I just call AS CS? Later.

Dave
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