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Old 02-02-2012, 09:11 AM   #1
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1975 27' Overlander
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Ends different than middle

I hope to someday polish my 1975 Overlander. The front and rear aluminum is a different colour than the middle. If I do polish it, will this still be the case? Or will it all look the same?
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Old 02-02-2012, 09:14 AM   #2
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I hope to someday polish my 1975 Overlander. The front and rear aluminum is a different colour than the middle. If I do polish it, will this still be the case? Or will it all look the same?
It will be close enough.

Andy
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Old 02-02-2012, 09:18 AM   #3
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Its funny that you say that. I was just having that conversation last week. I am polishing my 1982 34' now. The endcaps seem to be a different color than the straight panels before polishing. Yes, they did polish out fine
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Old 02-02-2012, 09:47 AM   #4
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Question

Would the "press forming" be the reason?

Even on our Classic the finish under the clear is slightly different.

Bob
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Old 02-02-2012, 10:17 AM   #5
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Would the "press forming" be the reason?

Even on our Classic the finish under the clear is slightly different.

Bob
Yes, the press forming stretches the clearcoat and aluminum changing the surface appearence of both, giving them a hazy look.
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Old 02-02-2012, 10:34 AM   #6
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Yes, the press forming stretches the clearcoat and aluminum changing the surface appearence of both, giving them a hazy look.
The press forming is done before the clearcoat is applied.

All the segments and quarter panels since 1969 are a different aluminum than the side sheets. From 1968 and older, all the segments only, are a different metal than the side sheets. metal

The aluminum that is used in the side sheets cannot be stretch formed, since it's much harder than the segment metal.

Andy
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Old 02-02-2012, 10:48 AM   #7
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Now I'm really kornfused Andy, I thought all panels were pre-coated by Alcoa?

I know our 63 was cleared at the factory.

Bob
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Old 02-02-2012, 10:53 AM   #8
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Good to know that after polishing it will be fine. I have lots to do before I get to the polishing stage.
Carry on,
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Old 02-02-2012, 10:59 AM   #9
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Good to know that after polishing it will be fine. I have lots to do before I get to the polishing stage.
Carry on,
Well, even if the color is a little off, the glare from the sun will blind you anyway!
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Old 02-02-2012, 12:15 PM   #10
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Now I'm really kornfused Andy, I thought all panels were pre-coated by Alcoa?

I know our 63 was cleared at the factory.

Bob
Bob.

Since the segments are all stretch formed, how can you stretch paint?

If that's possible, I would think our automotive industry would have gobbled that up years ago.

Andy
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Old 02-02-2012, 01:33 PM   #11
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Now I'm really kornfused Andy, I thought all panels were pre-coated by Alcoa?

I know our 63 was cleared at the factory.

Bob
Bob.

Airstream did indeed clearcoat the trailers and motorhomes.

It was an option in 62 and 63. Then in 1964, it was standard.

The formula was changed over time to keep up with better material, and technology.

Then, best I remember, in 1998 the metal was prefinished. The first year was terrible, then the formula was corrected.

Andy
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Old 02-02-2012, 01:46 PM   #12
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Bob.

Since the segments are all stretch formed, how can you stretch paint?

If that's possible, I would think our automotive industry would have gobbled that up years ago.

Andy
Andy,

Interesting....if they do coat the end panels at the factory,(before installation?), and they are aware of the corrosion concerns,(seams & rivets), there must be another reason why they wouldn't use uncoated panels and coat the entire coach in house before delivery.... as was done years ago.

Might be an easy way to avoid the filiform bad press, who knows.

Bob
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Old 02-02-2012, 02:04 PM   #13
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Andy,

Interesting....if they do coat the end panels at the factory,(before installation?), and they are aware of the corrosion concerns,(seams & rivets), there must be another reason why they wouldn't use uncoated panels and coat the entire coach in house before delivery.... as was done years ago.

Might be an easy way to avoid the filiform bad press, who knows.

Bob
Probably a variety of reasons starting with environmental (think Low VOC). I also suspect that a coating put on metal in a factory environment (precoating) is bound to last longer than a spray on coating.

Aaron
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Old 02-02-2012, 04:31 PM   #14
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Andy,

Interesting....if they do coat the end panels at the factory,(before installation?), and they are aware of the corrosion concerns,(seams & rivets), there must be another reason why they wouldn't use uncoated panels and coat the entire coach in house before delivery.... as was done years ago.

Might be an easy way to avoid the filiform bad press, who knows.

Bob
Bob.

I am in communications with Airstream at this point, regarding your concerns and questions.

Lets see what their responce is, and I will post it for the benefit of all.

Andy
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