I cut up some 3/4 ply for a small bookcase. Unfortunately, some of the pieces have moved (cupped). This was NOT cheap HD stuff. Went to the cabinet supply warehouse and got 7 ply stuff. About $65 a sheet.
Any hints on "decupping"? I clamped the pieces together (four shelves) with the cup facing each other and I've noticed some improvement.
Is this that common? I live in Northern CA, where it's been dry since May. Not to say we might have had some humidity. My neck of the woods gets a lot of overnight fog.
MJ