Reply by DrDirt

not sure if you can straighten it, or if it will just go back to the bowed (stress relieved state) again over time.

perhaps some kind of cross bracing at the back… such that the glue line makes the door more like a lamination and becomes “locked flat”

a door that big, you have to really really watch the grain. Flat sawn might work on small panels, but won’t stay flat over 4 feet.

Are you on/close to quartersawn for the rails and stiles? I am presuming so – - since that is usually the goal to see the ray fleck of the Quartersawn white oak but??? a pic would help.

How bad is the bow? If you lay the door on a flat surface how much gap is in the middle to the surface?

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