Hello Can,

Good intelligent question here!

>>> Before doing any painting, WASH the walls with a Dirtex/water solution and rinse. Let dry a day. Why??? Soap vapors, sprays, etc. just keep building up in a bath!!

** Because existing S/G is "slick", new paint doesn't get a good grip. Use a high-quality primer to provide a new "grip" layer.

** You still need TWO coats of the new paint however for best color-depth & durability.

** Use top-notch rollers/brushes.

** On your sills, I would lightly sand (220-grit pad), then prime after removing dust.

** If you have to do any hole-filling, do this first, let dry, & sand flush.

** Now, brush a thin coat of primer on repairs; then prime the whole room.

This is a recipe for success!

Faron

Is your bathroom painted with a latex or oil based semi-gloss?

As far as washing goes you should use a bleach and non-ammoniated cleaner mix to remove mildew and the dirt mentioned in the previous posting.