I painted my kitchen cabinets, and afterwards, close to half of the doors don't sit flush against the cabinet. It doesn't make much sense, but I suspect the painting process may have warped the doors a bit? (I used Stix primer to hopefully head against this, recommended by the guy at BM) They are a very hard wood (maybe red oak?). Does anyone know of a way to work on getting the doors flat again? Seems like something like steaming them somehow and then applying force in the right direction using a clamping system might work, but I would love input from someone who's dealt with something like this before.
Note that I also replaced the hinges, but I don't think they are the problem, since if i take them off, the raw door still does not lie flat against the cabinet. I'm including a photo of a problem door as well as a good one for comparison.
EDIT: adding a photo of the same problem door from the inside where you can see the shim I added to the hinge. Without the shim, the cabinet door does not sit flush on the opposite corner. I came upon this solution by putting the door on a flat table and observing that when I do that, 3 corners touch the table but the fourth does not (it's elevated). If I push the elevated corner down, the corner diagonal from it comes up instead. So I had to pick which corner of the door does not sit flush against the cabinet, and the corners with the hinges are less noticeable (and, possible to shim). But, it's still a bit of a sore thumb and now I'm wondering how to fix it altogether. Also adding a photo of the original cabinets.