Auto body repair & detailing: Filling a hole, razor blade, filling a hole

Question
How do I go about filling a golfball-sized hole on the edge of the hood?  I purchased some touch-up paint and had planned on sanding off some rust bubbles.  Well, the rust was a tad more extensive than it looked on the surface, and now I have holes.  I bought some body filler and now I want to know how to make it stay in the hole?  I've heard of using fiberglass cloth and putting some kind of filler over the top. Am I on the right track?

Answer
  hi wendy,
     you can go to your local home improvement store or wal-mart if you have one and get a selfsticking fiberglass screen that they use to seal the edges and holes in dry wall panels. it is about 2 inches wide and comes in a roll that you cut with a razor blade or sissores. it is selfsticking so all you have to do is grind down the area and cut a piece and stick it over the hole and then apply the filler. you may need more than one coat ,sand smooth and prime and repaint. thanks for writing.
                                          dave........