well, if you don't have the money to get it sanded down and re-cleared, you can try this.
1. Make sure you get off the excess that is peeling up around the spots that have already been chipped.
2. Sand the edges with about 800 grit wet paper. DO NOT SAND THE COLOR!!!
3. Go to Advance Auto Parts or Autozone and get some Duplicolor High Gloss Clear Coat finish or something like that. Not the high temp stuff. Just the regular High Gloss.
4. spray those areas a little closer and pull back before stopping.
5. Wait at least 24 hours.
6. Hit it with some 2000 grit sand paper. Let it soak in some water for at least 20 minutes and make sure to run water over while your sanding.
7. Buff the s*** out of the entire bumper with some buffing compound.
That's about all you can do without having it re-cleared. Problem you are going to have after doing this is the orange peel not matching the factory, so that might make it a little noticeable.