PREPARE OTHER UNPAINTED SURFACES

 
New Wallboard
Before painting materials like new sheetrock or gypsum board be sure all joints and patches are sanded smooth, dusted with rags or vacuumed. Next apply a PVA wallboard-specific primer. Pay attention to the manufacturer's instructions and spread rates. As an alternative, a general purpose stain-blocking interior primer can be used. If staining occurs with a PVA wallboard primer, apply a stain-blocking primer.

New Plaster
Allow plaster to dry thoroughly. With a simple patch job, this will take one to two days, for larger areas like walls and ceilings it can require a week or more depending on the weather and interior humidity conditions. Thick plaster applied in extremely humid conditions it can take a month to dry adequately. Once dry, all rough areas must be sanded smooth with medium grit paper followed by a second treatment with fine grit paper. Clean surface of all dust with dry rags or vacuum and then apply a stain-blocking interior latex primer recommended for plaster surfaces. Be sure to wear a mask and protective eyewear when sanding.

Tile
Treat any suspected mildew and inspect grout joints and repair them as necessary. Next wash the entire surface with a detergent and an abrasive non-metallic pad. Rinse and dry thoroughly. As an option to guarantee maximum adhesion, sand the tile surface with a fine (#220) aluminum oxide sand paper. Clean area off with a damp rag. Use a high-adhesion interior latex bonding primer. This type of primer requires the use of a respirator and ample ventilation. Allow it to dry thoroughly before applying a finish coat.