Took out my horn to start playing again after a couple years, and theres little bits of tarnish here and there on the bell that a typical polishing rag wont remove, might need something slightly abrasive or something that will eat it away? (using my nail i cant get it off) its just a little here and there, any ideas what i can do?

Try a lttle liquid silver polish on a soft rag......this should work if used sparingly and lightly