Welcome to the Newschoolers forums! You may read the forums as a guest, however you must be a registered member to post. Register to become a member today!
2 options... you can inject epoxy under the bubble then clamp the hell out of it, then base grind it flat... or you can cut the base away where it has bubbled, try to get the edge mostly straight (or at least push it back out of the core somewhat) then epoxy the hell out of it, then do a base patch.
The second option is harder but makes for a better repair.