Can I remove polyurethane but leave the stain?

I recently finished several doors in our house, using two coats of stain – one each of a different stain – and polyurethane to finish. For one door, I forgot to put on the 2nd coat of stain by accident before finishing.

Is it possible to remove the poly, without removing the stain so I can “simply” add the missed 2nd coat and then re-finish?

This is a pocket door that doesn’t appear to have a straightforward way to remove it without busting it out of the wall. Bonus points if the method can be done while the door remains in place.

I have no reservations about chemicals, realize some affect may befall the stain, and understand this isn’t going to be a pleasant experience no matter the method.