Hello,

A few fairly light to medium orange water stains have developed on our
white bathroom ceiling due to water dam. The typical problem.

A bit on in age now, and I would like to have to re-paint the ceiling
only once, if practical. It's a real job for me to do nowadays.

I know the smart way is to coat the stains with, I think I read to use
shellac (?), and then a white paint. This is supposed to prevent
additional bleed-thru.

Is there any product I can use that stands a good chance of doing it in
one coating/step ?

What about this KILZ I've heard about ? Would that do it in a single
step and prevent further bleeding thru of the stain
(assuming no more water leakages) ?

I think there are also similar products under different names, perhaps ?

Any thoughts would be most appreciated.

Thanks,
Bob