Yes, scuff surround wall, more likely it will end up WWW using H&L 320/400 on the pneumatic, wrong shape, but cut to size like he's done before. Walls, Idk, what do you think about skim coat and paint? (ya, the majority of this will fall on WWW's shoulders, I can only do a minute or two with arms above my torso at a time so trying to make it as simple as possible for him but still better for me than it is now. Yes Eric, I've watched some YouTubes, not sure if they are true or not but was hoping it would be easier than new drywall.
Wonder if there is some kind of etching treatment/solution for the tub surround? Skimming the rest of the wall surfaces is still no walk in the park IMO.... and being in a high humidity area? Hmmmmm......
It's hard to believe that there are dozens of "upside down houses" on the internet. Here's another for your bathroom ideas. I'll be dammed if I know how you'd ever get it to flush