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Old 01-14-2022, 07:29 PM   #2441
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1975 27' Overlander
San diego , California
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How do you treat or remove the filaform? Before adding corrosion x, how much elbow grease should we do to remove the existing corrosion? ��
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Old 01-15-2022, 04:50 PM   #2442
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Over the eons this thread has been live, every question has been answered, often many times. I wouldn't want to read through thousands of posts either, but the answers are there.
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Old 01-16-2022, 07:56 AM   #2443
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Quote:
Originally Posted by ChelleZ View Post
How do you treat or remove the filaform? Before adding corrosion x, how much elbow grease should we do to remove the existing corrosion? ��
For removing the filiform, remember if you have a later model AS, the metal is not Alclad AL, it is an alloy. (AS models after sometime in the 80s). The removal of Alcoa's surface coating will leave a gray AL, not the shiny silver look. I see you have a 75 model and should be ok lightly buffing the filiform away. Like Gene posted here, if you take the time to go back through these posts, everything you ever wanted to know is here.
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Old 03-25-2022, 07:14 PM   #2444
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We have a 2018 22FB that has filiform corrosion issues also. Does anyone have a good way to treat it?
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Old 03-26-2022, 02:49 PM   #2445
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We have a 2018 22FB that has filiform corrosion issues also. Does anyone have a good way to treat it?
You have some reading to do. The best way to deal with it has been posted by Robert Cross. Use the search engine to find his posts—they were a long time ago.

After many years of complaints about this, the company has failed to solve it and I think that means they don't care.
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Old 03-27-2022, 05:29 AM   #2446
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Wildwood , Missouri
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They must have done something, as I’m seeing far fewer posts about it. Our 04 had it bad. Our 2011 never got it. On our 2011 AS put the wrong bases on all the running lights. (The curved bases on flat surfaces) How did QC miss that? AS guys came to Missouri from the main office and swapped them all out. The sharp points of the curved bases were starting to form corrosion, the new larger base covered it all up. In eight years it never showed up again.
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Old 08-14-2022, 09:37 PM   #2447
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2005 25' Safari
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Quote:
Originally Posted by ROBERT CROSS View Post

I can only guess how many others have this problem and how many different solutions there must be out there.

This is how we decided to address it.
I didn't want to do any damage to the panel coating so trying to buff out just the hinges didn't seem like the way to go. Plus the Dremmel tool just wasn't cutting it. Decided that the old brush-on Rustoleum method would be worth a try.
Getting off the old clear-coat, paint remover? What to use? After much experimentation decided on Mostenbocker's Lift off 4 water-based Paint Remover. After masking, brush on, let set, scrape off with razor blade scraper. It did scratch the hinges. Starting with 400 wet sandpaper,then 600 and finally 1500, scratches gone. Brush-on four coats zinc-chromate primer, sanding each with 1500, using plenty of water.
Spend the bucks, go to art supply house and get several 1/2" artists brush's.
Another four coats of Rustoleum aluminum paint, again sanding each with
1500. Seal with Griot's Paint Sealer, and this is what you get.
Well I’ll be doing this I guess
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Old 08-15-2022, 06:22 AM   #2448
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2007 20' Safari
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My solution to Filiform Corrosion as well as the glued in bulkheads - I sold it!
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Old 08-16-2022, 07:38 AM   #2449
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1972 25' Tradewind
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Clear coat

[QUOTE=ROBERT CROSS;1835011]Remove clear coat....

Had to do the same on our Classic battery door frames...wet sand 800 to 1500, then seal it it once a year.



Robert,


What product are you using to "seal" the aluminum after wet

thank you
ERic
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Old 04-17-2023, 07:08 PM   #2450
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If you search the archives you will find my story of corrosion within a year of purchasing my then-new 2003 Safari. The factory replaced a number of items, including wheels and some skins. Trim items don't bother me, it's the skin that I am concerned about. Now I have significant filiform skin corrosion below my tail lights (either I didn't notice it before I had the work done by Airstream, or it is "new", I don't know which). So far the problem is cosmetic, and the trailer will probably functionally last a lifetime (stored indoors). But it is very bothersome to spend so much on a product and have it look so ugly!

I have a question... does anyone have a trailer that is 2-6 years old that does NOT have filiform corrosion of the skin itself? See my photo below for a filiform skin corrosion example...
I have a 2017 30' Classic that sits 6 months every year two blocks from a beach in Florida. Wash and wax regularly. The only areas I have noticed minor filiform is some of the marker lights. Other than that nothing.I need to add that it never seen snow nor has it ever needed winterizing and is plugged into shore power full time while parked on the driveway.
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