Oxidized Filler Cap

[Esser]

OK So my one fuel tank came from the factory with heavy oxidization. When I was sloshing my tanks a lot of rust flakes came out. I am worried this will keep happing. What can I use to clean the rust off the cap that wont damage the fibre glass?

http://i1042.photobucket.com/albums/b423/joshesser/Kitfox%20Build/file_zpsbee64fe9.jpg (http://s1042.photobucket.com/user/joshesser/media/Kitfox%20Build/file_zpsbee64fe9.jpg.html)
Rust Flakes



http://i1042.photobucket.com/albums/b423/joshesser/Kitfox%20Build/file_zps46964035.jpg (http://s1042.photobucket.com/user/joshesser/media/Kitfox%20Build/file_zps46964035.jpg.html)
Culprit

[Geowitz]

I had similar issues. For me I just used a dremel with small wire brush to clean them up inside and out. Rinsed everything out and then coated with LPS-3. Once I started flying and having fuel sloshing onto them it seems to have taken care of itself more or less. A little surface rust now and again, but nothing that worries me. Wish they were stainless.

[Av8r_Sed]

The old standard way to treat this is to use Naval Jelly, only on the rusted parts. I'd probably apply with a Q-tip and then remove carefully so it doesn't get on anything else.

[Esser]

I wonder who the mcbeans supplier for these tanks are? A stainless fitting or even a skim of grease on the steel would go a long way here