looks a little pricey to me for what you get. look and ask around for a store that sells polishing stuff, i know ace sells some stuff, but the ace where i live isnt' your typical ace either... maybe some auto paint store might have something... anyways get a polishing wheel and a bar of brown rouge. the wheel can be hooked up to a motor, angle polisher thing, die grinder, drill, anything that spins. I got a 3" buffer wheel at a swap meet for something like $6, and the bars for $2.50 a piece. if you start out with a good clean piece of metal like diamon plate then you'll be amazed how fast and easy it is to get a very good looking shine on it. all the polishing nightmares you hear are from sanding down a rough piece of metal and then trying to make it look perfect, but that shouldn't be your case.
good luck!