What makes a dent a candidate for Paintless Dent Removal is not so much size as the condition of the paint.
Even though the paint was scratched on this door, Paintless Dent Repair was an excellent choice for the owner who was selling the car.

BMW 5 with dent in door before paintless dent repair

 BMW 5 after paintless dent remoaval

Minor scratches in the area of this dent removal are still visible but hardly noticeable in person