Let me start off by saying - I am a first time home owner who is trying to figure things out as I go... At first I thought repairing these walls in my closets would be a fairly "easy" task... But now I'm second guessing myself. Coming here to get some tips. I'd love to do this repair myself if I can't be pointed in the right direction.
I attached a few photos of one of the closets that previously had some water damage (just had a brand new roof installed so leak is taken care of now). I thought it would be as simple as peeling off paint/wallpaper and patching with plaster - but now I've uncovered this brown paper underneath and I'm not sure how to go about patching and then painting over top... The "wall" is slanted and you can see where the water damage has trailed down to the shelf.
I'm not sure what all the layers are - the more "sedimentary" layer, then the plaster layer, then the brown paper, then paint. And some places all the layers are coming off and in other places, only the paint and brown paper are coming off...
Do I need to completely strip the whole closet and re-plaster/prime seal and then paint? Orrrrrr if not - can someone give me some tips on which direction to go?
Thank you in advance, if you can help, you'd be a life saver... I'd love to accomplish this myself.