Just out of curiosity, I tried the homemade silver polish method (hot water, aluminium foil, baking soda and salt) on the new pieces I got recently, and some other ones from years ago. And MAN, it worked like magic! Forgot to take a before picture of the gravy boat, it was so tarnished, dark gray kind of dirty, kind of like this pic I found. And now is the amazing after pictures! I just dipped it in that water for about 5 seconds.
And here are the before and after pictures of the others (silverplate actually). Not as shiny as the gravy boat, but pretty good as well. Don't really care that they are not silver, as long as they are shiny, I love them. And for less than a dollar for 4 pieces, who cares?