In article , albee wrote:
Odd question, I'm sure, but after priming our bathroom walls and
ceiling, including the ceiling inside the shower, we painted the walls
a darker color, but were going to paint the ceiling white. Since the
primer was white, is there a problem with just leaving it as is, or
does the paint provide something that the primer doesn't. I'm guessing
that the latex provides some water resistance, but just guessing.

You could get away with that in most rooms, but the two where you shouldn't
even think about trying it are the kitchen and the bathroom. Primer doesn't
have anywhere near the moisture resistance of finish paint, and you WILL have
mildew growing on that primer in a very short time. The best choice for a
bathroom ceiling is a high-quality gloss or semi-gloss OIL-based paint.

And next time, paint the ceiling before you paint the walls -- that way, the
roller spatters from painting the ceiling will get covered up when you do the
walls. :-)

--
Regards,
Doug Miller (alphageek at milmac dot com)

It's time to throw all their damned tea in the harbor again.