go to your local walmart/kmart and go by the models (airplanes and cars and such) they sell a little kit with 500,750,1000,1250,1500,2000 grit sand paper. only 4.99 good luck, only reason i mention this is because no one can find sand paper
i always just used rubbing compound.. cool, never thought of using model sandpaper and too think, all the years of building them things.. i never sanded tho.. lol -scoob8000