Primer Choice for Bathroom Ceiling?
Our master bathroom (house bought last year and renovated by previous owner) shows dots of mold/mildew on the ceiling after about a month of use. I wipe it down with a bleach pad. If we don't use the bathroom, no stains. So, I guess the steam from the shower causes the mold/mildew. There is no mold/mildew on the walls - just ceiling.
We run the bathroom fan, but maybe because of the distance, it doesn't suck out all the moisture. I'm not in a position to move it closer to the shower right now. For one, there is a rainfall shower head that would have to be replaced. So, let's say the fan stays put.
The only other issue I can address is that the ceiling paint is a simple flat interior paint. I guess they didn't use a bathroom paint. So, I thought I would put primer over the existing paint and then buy the Sherwin Williams bath paint and put it over the primer.
1. What primer should I get? Water-based or oil-based? From searching online, I can't figure out which one.
2. Note that this primer is going over existing paint. Other than sanding down and wiping the ceiling clean, do I need to do anything else before I prime? Does your answer change based on the type of primer?
3. How many coats of primer do I need to apply?
Thanks in advance!