Help re bathroom please !

[Tiddleandplonk]

Hello. We have a very small downstairs bathroom which has a very small window and a small extractor fan.
When we bought the house 3 years ago everything was decorated. Since then , the paint in the bathroom has sort of blistered and come of like bits of wallpaper. We tried to scrape it off ,but some ( most) of it sticks on the the walls/ ceiling and a 2 hour stint with a scraper only got the very smallest of amounts off.
We have sought advice from different builders who seem to think this is eithee due to condensarion and/ or the prev owner painting direct onto what we can see below is nice plaster instead of doing a layer of something else first.
Been advised
To replaster the whole lot over the falky bits.
To rub down and paint the whole lot with oil based paint
To have the whole bathroom lined with shower board to.hide it.
We dont know what to do and get different advice and it looks awful.
Help much appriciated and I could incude pic !

What's your budget?

I'd be tempted to have the whole room skimmed and then tiled.

Half of the room is the smooth stuff they use for showers.
I think tiles would be good. The only thing is wouldnt that change the position of the loo and sink as the tiles would need room ro be made.? Do you mean ceilimg also tiled ? Thanks !

No don't tile the ceiling, just reskim the plaster if needed and paint it white.

You will get a better finish if you remove the WC and sink, skim and tile the walls and then put the ceramics back into place.

Thanks . We were advised to re plaster ceiling but sort of pressumed if we painted it then rhe bubbley paint problem would rw occur ?

Replastering should should put whatever they underlying problem is. Once the plaster has fully dried use a mist coat first and then two top coats. You could look at specialist paint formulated for bathrooms that will work well in a high moisture area.

https://www.dulux.co.uk/en/expert-help/dr-dulux-painting-on-new-plaster

Just thought - have you got adequate ventilation in the bathroom? A fan that vents to outside to clear the steam and condensation when you bath/shower?

You can get more powerful extractor fans, and make sure the window is open as much as possible.

Then sand and repaint for now and see how the condensation goes, before replastering etc. The wet is the problem.