Lightly sand it a bit to level out the dope you have put on it. Take a piece of silk span and tear a piece into a round patch big enough to cover the hole. Dope that in place over the hole. Dab in some extra filler coats and light sand the edge as they dry. The secret here is to tear the patch and not use scissors. The torn edge fills better and blends in better and will be invisible when finished.
  Type at you later,
  Dan McEntee