Wrinkled ceiling from prior water leak.

[MikeW]

Due to poor craftsmanship by previous owner on a roof repair I have encountered a roof leak which has since been sealed and stays dry now, but the remnants of the leak have "wrinkled" a section of my ceiling panel approximately 1 ft wide x 2 ft long area. It is not torn through but it is unsightly to me because I know it's there. Nobody else seems to notice but it bothers me. Outside of replacing the whole ceiling panel which involves removing all the kitchen area cabinets on both sides of the trailer, does anyone have a suggested fix for my issue? I do not have photos currently because our trailer is parked at it's summer spot. I want to do something about it this winter season and I am asking for ideas on a possible repair. Thanks for any thoughts.