Peeling paint in bathroom

[Goodmum1234]

After plastering a few years ago a tenant painted straight onto the walls without a watery coat, it has been peeling since.
I'm useless at decorating but think I need to sandpaper it all off, then paint in a watery paint and then a few coats of a good quality bathroom paint.
Am
Am I on the right lines?
Thanks in advance

[DaisyChainsForever]

We did 2 'mist' coats on all our plastered walls. Do u have good ventilation in the bathroom? It may not have been helped by steam from a shower/bath.

[wowfudge]

Removing the peeling paint and redoing is the way to go. Not sure mist coating will be necessary as the plaster should be dry by now. However, it won't hurt.

[wowfudge]

Removing the peeling paint and redoing is the way to go. Not sure mist coating will be necessary as the plaster should be dry by now. However, it won't hurt.

[Goodmum1234]

Thank you both. Yes there's a good fan. Some of the paint might not sand off though so I'm worried there will be bumps when painted unless I scrape. What do you think?