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Old 07-06-2016, 06:07 AM   #15
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2012 25' Flying Cloud
Battle Lake , Minnesota
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I put the acrylic on the edges about three years ago, after washing and wiping down (be very sure it's dry). Just used the edge itself as a guide for the felt tip, it's a nice sharp line. I think a brush would not leave as straight a line.

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Old 07-06-2016, 09:51 AM   #16
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Originally Posted by Bob662 View Post
I look at this issue from my half century involvement with aviation. Aircraft manufacturers' solution to this corrosion issue is the use of Alclad panels, and paint, as in painting the entire aircraft. Even then if not well-prepared, usually with an alodine solution and wash before the paint is applied, filiform corrosion can be experienced.
So Airstream's solution is to use pre-coated aluminum sheets and hope for the best on the cut edges and drilled holes. Applying a fine line of clear paint sealant to the cut edges is time-consuming and something I suspect the Factory isn't willing to do. And then, what about the rivets?

So I use Corrosion X. I sprayed every rivet head and panel edge below the roof, let it soak in for a half-hour, then wiped off the excess with a cloth rag. It took about an hour, but I also didn't do the window frames. I believe the window frames, since they are unpainted, are unlikely to get filiform corrosion. (Filiform corrosion runs under something, usually paint. These windows still should be watched because, since they are unprotected, surface corrosion is a risk.)

Someone asked how often to re-treat? Corrosion X is widely used in aviation to spray the untreated interior of wings and fuselages, particularly if not painted with a corrosion preventative such as zinc chromate or its follow-on chromate-free product. Once a year, or even less frequently in non-coastal areas, seems to work quite well. So there's no one answer to the "how often?" question. If you live in a corrosive coastal area, or camp fairly frequently on the coast (including 100 miles inland), or you drive on salted roads, I'd re-treat every year. If you're in Arizona or the mid-West, probably longer will work. Also, if you're a frequent washer, I'd re-treat more often because soap does remove Corrosion X (except where it has crept between the aluminum panels and under rivet heads).

Since it's not a big time-consumer to re-treat, I plan to do it every year here in North Mississippi. After all, it takes less time to re-treat than it does to wash.

If I understand this correctly we are all towing an Airplane Fuselage on wheels. I have to think about doing all this work to maintain it or just trading every three years or so.

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Old 07-06-2016, 01:17 PM   #17
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Liberty Corner , New Jersey
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Originally Posted by franklyfrank View Post
If I understand this correctly we are all towing an Airplane Fuselage on wheels. I have to think about doing all this work to maintain it or just trading every three years or so.
This could be a new direction for AS. They could begin leasing the trailers just as the auto companies discovered a couple decades ago. AS gets a steady monthly income and the users get a new AS every 2 to 3 years,
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Old 07-08-2016, 02:57 PM   #18
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2018 27' International
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Originally Posted by dkottum View Post
For the uncoated panel edges I took a felt tip acrylic touchup pen and run it carefully along the edge. Let it dry and again for three coats. Use the sharpest tip of the pen so maybe there is a 1/16 inch overlap on each panel side. I think that protects the edge fairly well.

Using CorrosionX and Boeshield T9 we are going on five years and no corrosion anywhere on our Airstream. However we have not exposed it to northern road salt or coastal salt air. We have been applying the protection a couple of times a year now, would be more often in salt environment, less in the desert.
Can someone post a link to or actual description (brand) of the "felt-tipped acrylic pen" that they are using on their panel edges? It sounds like there is a particular brand that has a finer tip for more precise application... We are not yet AS owners (still researching and daydreaming), but are trying to gain as much knowledge in advance as possible. I have to admit, I am feeling a little nervous/hesitant about this filiform issue ...
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Old 07-09-2016, 12:37 PM   #19
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Liberty Corner , New Jersey
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If you want an AS just get it. They are a great looking trailer with a great history. Just realize that the trailer will most likely be a disappointment if you expect a comparable level of quality. It seems that most owners don't find it to be an issue with increasing sales and repeat buyers. The filiform is a case and point. I am sure that most owners don't perform the care that is discussed above or on the other filiform threads and yet they appear to be happy.

You can always just not look too close at the panel edges and there will never be a problem.

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