Pre-exposure prophylaxis (or PrEP) is when people at very high risk for HIV take HIV medicines daily to lower their chances of getting infected. PrEP can stop HIV from taking hold and spreading throughout your body.
In the dry plaster or fresco secco technique, pigments are usually mixed with water, although other substances might also be used. The paint is then applied to a dry plaster wall which has been wetted down with water. Since the plaster is relatively dry, it is non-absorbent, and the pigment adheres to the surface of the plaster. This technique differs from true fresco (described below) in several ways. The colors tend to flake off the surface of the plaster.
Old plaster walls are more temperamental than drywall so you have to put a little more elbow grease into the preparation work before you paint. Don't take short cuts on the prep work or you may find yourself doing repairs later. Latex primer can be used but alkyd primers are recommended for best results on plaster. 2  Use trisodium phosphate (TSP) to clean heavily soiled walls. 3  Use a paint pole to extend the reach of the roller.