Suction

• As strange as it may sound, your toilet plunger can actually be used as a tool to remove door dents! The plunger works best on broad, sweeping dents rather than sharper dents that cross body lines or are smaller than a baseball. The best way to utilize this tool is with water. First, clean the dented area with dish soap and a wet rag. You do not have to worry about drying the area, because this process works best when wet anyhow. Next, dip the toilet plunger into water, stick it to the center of the dented area tightly, and slowly pull it out. If the dent does not go away with this method, try pulling harder and faster, because some dents can be quite stubborn.
  
  

Dent pullers

• A dent puller is a tool used by many amateur auto-body specialists, and they can be quite effective when used properly. Some dent pullers work on the same theory as the toilet plunger, using suction cups and a lever, which applies pressure once the connection is made. Others require drilling holes into the dent, and then the mechanism locks into the center of the dent via the holes, and simply pulls the body back out into shape. If you use this method, Bondo or other body filler will have to be used to fill the holes before paint is applied, or the body might rust. Depending on the brand and style of the dent puller, these can be purchased very cheaply, or cost quite a bit of money.
  
  

Accessing the back of dent

• Some dents, especially the ones that occur in doors or quarter panels, are accessible from the back of them. If the dent is located in the door, you might try removing the door panel inside the vehicle and accessing the rear of the dent. In this manner, the dent may simply be able to be pushed out by hand, or using a rubber coated mallet or dead-blow hammer. The process works likewise for other areas of the body which contain dents -- if you can access the back of the panel, some dents pop right out with a little tap.