When I asked her what to do she just mentioned that;
- I will take care of this. You are after a great result.
- Of cause I am.
- Don't mind ask me then! We don't do this for public but I will see if I can help you.
When I got back to pick it up I saw that she had some kind of copper/brass cleaning stuff in a small pot with a little brush. I didn't mind to ask her as the result was great.
I will keep the contact with her if I have some more odd brass parts.