Returning home from the shore, means it’s time to hose off the salt deposits from the trailer. It’s also the time for the trailer’s annual, big wash and wax job. This time, though, we knew it would entail more, and we’ve been preparing.

Ever since Randy (a fellow 23′2007 Safari SE trailer owner) asked the question, “Does anyone know what this is?”, on the Airstream Knowledge Sharing Forums, over a year ago, we’ve been watching for its appearance. We’ve been following the Airforums’ eye-opening thread, “Corrosion problems with new Airstreams“, for a year now. We’ve been quietly holding our own vigil, carefully inspecting our trailer for the inevitable worm-like filiform to grow from the unprotected edges, rivet holes and scratches in the aluminum skin and burrow under the clear coat where humid conditions help it to thrive.

Our filiform were slow to emerge, probably due to using a good wax last year, Meguiar’s Mirror Glaze, Professional Polymer Sealant, #20, as part of our wash and wax regimen. But emerge they did, white worm-like, thread-like filaments sprouting here and there along the belt-line area.

And from various rivet holes…

And on taillight housing bezels…

And wheel rims…

Using Google search, I found interesting background information on filiform corrosion and watched how it grows. I am learning that corrosion is a threat to all trailers and filiform corrosion is a threat to all aluminum trailers with a clear coat finish. As of this writing, there are 29 fascinating pages regarding this filiform issue on the Airforum’s thread, “Corrosion problems with new Airstreams“, along with strategies to control this condition.

This information helped us to select our interventions for the counterattack which coincided with our wash and wax job on our return from the beach. First, I washed the trailer with a good car wash and chose, Meguiar’s Deep Crystal Car Wash.

We chose and applied CorrosionX Aviation to the entire belt-line area, taillight bezels and wheel rims. I also applied CorrosionX to the stabilizing jacks, which were showing some corrosion. The following day, I wiped off the oily excess and sprayed on Boeshield T-9 (”Rust & Corrosion Protection, Waterproof Lubrication”, as stated on the label). I liked how T-9 dried, leaving a waxy residue. Meguiar’s Professional Sealant #20 was then applied and buffed.

Read Randy’s experience with the anti-corrosion product, ACF-50, sent to him by Airstream last spring. Randy then went the extra mile(s) and took his trailer to Jackson Center where the Airstream factory applied the Classic Beltline Trim under warranty.

We’re hopeful that our interventions will be successful in protecting our Airstream trailer, while keeping it looking good.