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My 2015 JK (just bought it 4 weeks ago) has an almost rust free frame and drivetrain except for the front steering knuckles. They must not paint those things and the ends of the axle housings at the factory as they are all rusted. Not too bad, primarily surface rust.


My OCD will not let that stand. Is it safe/OK to paint or spray the area with WD40 or Fluid Film to stop further rust? I'm worried about it rusting up worse and causing damage to the front axle. Figured either paint, WD40 or Fluid Film would keep it from rusting further.


What does the Collective think? What are you guys doing - other than ignoring it?


Thanks
 

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I spray bomb with Rustoleum, then I coat with Fluid Film every fall.


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There are some cool rust converter options out there, I use one from Rustoleum and one from Loctite. You paint them on and they convert the rust to a non-rust surface. You can then leave as is or paint over for better protection.
If you spray your knuckles, remove the brake discs or mask off first.
 
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