You should be able to bring it back up, any pics of how it looks now?
Once something has been polished elbow grease will bring it back up, the only variable is how much effort it takes, Sometimes it is easier to get it re-licked over agin properly by machine. A lot of my mates work is re polishing previously polished bits. There is a lacquer now that can take to polished metal works if you want a shine that lasts without work, it does dull the finish slightly.
That said if you have access to a rotary or Porter cable and some 4 inch spot pads they can be used to save yourself so sore fingers.