wood veneer, water penetration damage

[Barker]

My iSonic 101 Wood has water damage to the wood skinned planing surface. Water has penetrated the thin paint coat and the wood veneer has cracked along the grain. Wetting/ drying cycles have unstuck and shrunk the material so there are now many raised lines running down the under surface of the board. Further drying will see these raise as the unstuck wood shrinks back. Question is, how to treat and repair? Any suggestions gratefully received.