Permawhite (waterbased satin) is a decent paint but quite expensive. £40 for 2.5L
I was about to say that I normally default to Dulux Trade water based eggshell, but that now seems to be £50 for 2.5L.
Go with the Zinsser.
Good luck. Let us know how you get on.
Haha - 'let us know how you get on'
So, I made the fatal blunder of not looking properly up close at the ceiling before I started, and it was more cracked than I first though (whereas I thought it was one section, it was actually more like one section of the en-suite didn't have peeling/cracking paint). However, as I had already got ready to deal with this as planned I did as mentioned, sugar soap, sanded off bits off flaking paint (which extended slightly as I sanded...).
Sugar soap dried, and I thought, okay, this still might work doesn't look
too bad - start putting the paint on (colour difference between new white and old paint is SHOCKING), all going well until the previous paint starts to peel off more as it gets painted over... so I paint over the area where the paint used to be (again, it's not back to plaster, although the coving over the shower has definitely reached the end of it's life...). I have done a first coat and now waiting for it to dry before I go back and re-assess.
I think it's a slightly bigger job than just a lick of paint... but will confirm in a few hours...
Back again with some pictures of the 'drying' progress - as you can see, it has not gone well. That's NEW peeling paint.
Was I meant to sand the whole ceiling down as opposed to just the bits around the previous flaking paint? Do I re-sand these sections and re-apply the paint (ensuring it's not saturated) once it's all fully dry?
What does this mean for using the shower if I can’t fix it? Hold off until it’s done properly? Or fine but it won’t look pretty…