On a Rebel, most tank dents are caused by the turn signals when the bike falls over. They are in a highly crowned area. I have never seen anyone successfully remove such a dent. When the metal bends, it also stretches. You can get part of it out, but not all of it. You will still have to use filler, and repaint the tank, which is the super expensive part. I have been quoted $500-$700 for repainting a motorcycle tank and fenders. And that was without clearcoat. I am not a believer in clearcoat. It scratches too easy, burns off easy, and polish and wax don't do a bit of good on clearcoat.