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Old 05-23-2012, 04:35 PM   #16
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No, you do not need to strip it. Apply one coat of Zinsser Cover-Stain. This is a fast-dry, oil-based primer.

Others have advised you about proper ventilation; be sure your fan is big enough and clean enough to do an adequate job.


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Old 05-24-2012, 09:09 PM   #17
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Originally Posted by RHulsmeyer View Post
so do i need to take this down to bare plaster before repainting to get it to stop?
Too much work! I would try drilling the spots out and patching with joint compound before taking it all down to original plaster.
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Old 10-30-2012, 05:26 PM   #18
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We used to have the same problem too but after we added a good ceiling fan (Panasonic has the best bathroom ceiling fan BTW!), the problem went away almost immediately. Just my 2 cents.
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Old 10-30-2012, 08:18 PM   #19
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Is there a good exhaust fan?
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Old 12-27-2016, 07:34 AM   #20
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Re: spots on bathroom ceiling

This may sound crazy but I think it's makeup powder/residue becoming airborne (if not washed off before showering) then condensing when the moist air cools. Wondering if many people with these brownish spots use makeup. Stranger things have happened. My experience is the spots appear when my daughter used the bathroom shower. They were there when she was staying with me for any length of time and then not there when it was just me using the shower. They would appear even when using the ceiling fan.


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spots on ceiling

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