silver placed vase with spots on it..

i got a silver plated vase about 12 in. high and 5 in. wide.. it looks like a flower type vase, its suppose to be silver plated according to the label on the bottom of the vase.. the inside is stained from the bottom to about half way up with what looks like water stains.. and there are alot of spots on it, i looked at the spots with a magnifier and it seems to be outward not an inware mark like a rust or tarnish spot where the metal is missing.. this seems like a water deposit??/ any ideas on how to get rid of water spots on silver plated??? thanks for a reply.....

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