Re: Peeling Bathroom Paint
The peeling paint is a moisture issue, get that area vented better, or at the very least, get a desk fan to circulate the air in the bathroom (door open, of course ) after each shower.
As to repair, scr-ape off the loose stuff, then float out the ceiling with drywall compound. Lightly sand between coats until you get the desired smoothness. If there is texture, you can apply new texture after it is floated and sanded smooth. Once all this is done and dry, apply two coats of Bull's Eye 123 primer and two coats of your paint of choice, semi-gloss/gloss paints hold up and protect better in moist environments. As DJ said, you do not need Acry-Shield, but it won't hurt anything if you use it.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!