Not to disagree, rather to suggest an option; If you're living in high moisture areas (Seattle, Houston, Northern Minnesota) I would still use an oil primer such as Zin**er's Coverstain and a quality oil finish like Ben M**re's oil Impervo, especially in a repeatedly mist saturated room like the family bath...Latex is SO susceptible to moisture, the least breach in the finish coat can cause all manner of headaches, not the least of them molds forming under the paint. Latex products proved effective in arid regions (I worked in central AZ for several years), but I have found that problems like drywall screws and nails rusting through coats of latex and the slow softening and eventual disintegration of drywall panels (at tape joints mostly) made oil paint a desireable alternative...
Also, the cure rate for most acrylics is much longer than most people realize; acrylic paint has plastic resins that don't dry, they
cure. I generally tell my customers not to subject a new paintjob to too much abuse for 7-10 days to allow for those acrylics to set...In a bathroom setting that wait can be excruciating...
