One, How to handle the peeling of paintless doors.
1、Adhesive
Clean the affected area and apply 502 or AB glue to the cracks. Then, press firmly for about 5 minutes. If the cracks are small, simply apply glue to the affected area.
2、Drilling
Go to a hardware store and purchase a few nails for construction purposes. Then, remove a few nails from the damaged area and hammer them in. It is best to apply white glue to the damaged area before hammering in the nails, as this will not only fix the problem but also prevent further damage and cracking in the future.
Two. Methods for repairing warped doors without painting.

1、After removal, reinstall.
We should first consider removing and replacing the deformed door frame, followed by repairing it and then re-installing the frame. However, if the issue is not addressed promptly, replacement may be necessary.
2、Hire a carpenter to repair.
The simplest and most cost-effective method is to hire a carpenter to remove the uneven portions of the door frame.
3、Choose repairing door
If the door frame is warped and the door cannot be closed, another approach is to repair the door instead of repairing the door frame.