ooo ooo me!
i have an electric buffer i bought just for buffing my tank. (i got it used and abused)
i don't recommend the sandpaper unless it is a very tiny area and you have a lot of time, patience and arm strength. it will take forever, your arm will hurt, and it may not even come out right.
mine was COVERED in micro scratches. i used my electric buffer from home depot, and some buffing stuff i got from MS.
after 15ish hours of buffing, it looked a lot lot lot better. some big scratches still remained, but the haze that was there is gone.
i will gladly loan you the buffer and the buffing agent i have left over. pm me if interested.