Cleaning up Norseman terminals

[RyanN]

I'm rebuilding my mast, and I'd like to get my rigging terminals looking better. At the very least so I can inspect them better.
Currently, many of them have that golden-brown patina that old stainless gets. I've thought about sending them somewhere to get electropolished (outside only), but I was hoping for a better DIY solution (mechanical, chemical, or both). I've got almost 30 terminals to clean up.

Any suggestions?