What paint strippers are out there for cracked bathroom paint on old plaster?

I've seen all these nontoxic ones that have a load of reviews (with picture evidence) stating that they are a waste of money. I've also seen that NitroMors has changed its formula and is no longer particularly effective.

I have at least two layers of paint in this bathroom, including one on the ceiling. I presume no piss coat. What stripper would I buy? It needs to be easily cleaned with warm water after the fact, since there's a cat in the house who will want use of the bathroom when its all done. During is fine, there's a fan in the bathroom and he can be given alternative solutions for a short period.