How do I repair a moisture damaged drywall in my shower?
This is a painted wall, and the paint is gone in some areas and the spots that have no paint get soaked when I use the shower. In these areas the wall is not flat, there are cavities where there is no paint.
I have found a few similar questions on this site, the answers recommend tiles, etc, I would prefer to leave it painted, and not reinstall this section of the wall. So I do not want to cut out this section and install cement board. I just want to waterproof it, fill in the cavities, and paint.
I have no idea what materials to use, how to waterproof it, etc. I have never done it. Please help.
EDIT: this is around the plastic shower stall, you can see the side of the tub in the left part of the photo.