If you remove it, you can check it for pitting on the sealing face an also that all orifices are clean. You can clean the visible part if it with a brass brush on a dremel or similar to get rid of the remaining rust. If you then polish it, it will be reasonably resistant against new rust. Then again, a new one probably does not cost the world.
I’ll soak it overnight and take a closer look.
Definitely going to look into purchasing new ones 👍🏽
***I checked on MG Cycle and it’s only $10 for a two pack of bleeder nipples. Done!***
