I have been asked on several painting jobs to shine up the brass fixtures around and on the front doorways.
I have got some brasso and my dremel tool and cleaned up the brass. Then I have sprayed the brass with clear polyurethane in a spray can. This has worked and does require maintenance periodically especially in the summer.
This works great.
Now, wonder if you degrease the cabinets and make them squeaky clean and did the same thing.