I have used the hot shower open bag trick to fix paintballs.
Basicly, open up all the bags while you take a hot shower. the steam will get into the bag and "Plump" up the paintballs. It has worked to restore some pretty bad paint for me!
just be sure to close the bags after your done and move the balls around in the bag too while your at it.
Guns Kill People Like Spoons Made Rosie Odonnell fat.