@Iluviaporos - I've got a set of brass masks from Africa which need a good polish. Even though brass doesn't tarnish as much as some other metals might, it still needs to be kept up.
I know they used to use polished brass as a mirror in the old days, but I don't think I'd want the masks to be that bright, since it would look quite garish. I like that they look a bit old and mysterious.
Although I actually got to see one being made while I was buying them. They melted down some old brass coins in order to get the strips of metal which they then hammered over a wood shell.
It was fascinating seeing what was likely the traditional way braziers had worked in that country for centuries.