Rust on Inside of Chugger Pump Gearhead

[Brew18]

I soaked the Gearhead, impeller and cover of my Chugger pump in pbw and noticed this on the Gearhead. Is this rust!?

 

[LarMoeCur]

If you have some BKF you can polish that right off. Looks like left overs from the tooling process.

 

[Brew18]

There’s a bit inside the intake which I can’t get to. Is it ok if I just leave this alone? I’m assuming not harmful to the beer at all...right?

 

[stevehaun]

Harmless! That said, it would be easy to clean up with a 3M scrubbie and some barkeepers friend.

 

[LarMoeCur]

BKF Paste on a Q-tip should reach inside the intake.