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Easiest way to ruin that part is to home job paint it.
Paint could seep in and ruin those connectors.
I wouldn't even wire brush it because I can be clumsy and in a hurry and accidentally break something.
If it really really bothers you...be extremely careful to not hit something with your hand while "fixing that rust".
That part will take another 25 years to rust through. If in 25 years it does rust through...then it will quit working and *THEN* you will need to replace it.
Quick story about me...
In one of my AW-11 MRs I decided I needed to "refresh my engine bay". I did a good job until I took stuff out that was bolted into the engine. When I put it back in...I didn't not know what a "Torque Wrench" was and I stripped a few (more than 2) parts. I ended up getting that stuff "tapped and died" (have no idea the past tense of that action)...total cost...20$ in parts...150$ in labor...
For reference...it was where the throttle cable holder was bolted on...so I couldn't just "sorta put it back in there and hope for the best".
So yeah...leave it be...
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