Answers:
First, lightly sand the surface and clean it with a sponge dipped in tsp (trisodium phosphate) mixed with water.
allow the surface to dry.
coat it with an oil or latex bonding primer. ...
allow the primer to dry.
coat with two coats of high-quality latex paint.
Disposable and/or compact renewable dehumidifiers can be used in these areas to combat moisture. eva-dry dehumidifiers use odorless, non-toxic components to free your kitchen from excessive moisture. you can also use them anywhere in and around your kitchen, cabinets, and pantry
Yes you can paint over artex
Most experts say that you'll need to paint every five to ten years, depending on factors such as where you live, climate and weather, and the previous paint job. also, keep in mind that every surface will be a little different