Yes, most of the time.  Most of the minor door dings and dents that we are asked to remove, will repair completely.  By this I mean that you will not be able to find where the dent was when we are  done.  Not every dent repair technician can say this.  Paintless dent removal is an art, and takes years to master.
We are asked to repair some dents that are severe, deep, or sharp.  Some of these dents cannot be repaired 100%.  We can often achieve a great repair, but not one where no evidence can be found of our work.  We are always able to tell a customer in advance what level of repair can be achieved.  We always guarantee your satisfaction on every repair.  We know you will be impressed.