fornesto,
Working with plywood, Baltic Birch, Apple-ply, or even solid woods, one is subject to a universal "given"! That "given" is whatever you do to one side, you have to do to the other. When you see a piece of wood that is veneered, the other side of that panel has to be veneered with the same material..............or the panel will warp. It just will. It's a fact. Wood breathes..................all wood, not just plywoods. It has to breath exactly the same from both sides. If you paint one side, you need to paint the other with the same material. If you seal one side, you must seal the other. When I make a table top, even one 3" thick, and apply veneer to it, the other side HAS to be veneered with the same veneer. Expensive, but required................because even a 3" thick top will bow eventually if veneered only on one side.
So to repair your door, you need to take if off the hinges, tear it apart and start over. Sorry if that's a disappointment, but dem's da facts!
