Wait four to six weeks for new wood to dehydrate.
Rinse new exterior wood using a pressure washer. Wait one to two hours for the wood to dry. Wipe down new interior wood with a tack cloth.
Coat the clean wood with a base coat of primer. Use a latex primer on interior wood. Use an acrylic latex primer on exterior wood. Apply using a paintbrush manufactured for use with water-based acrylic and latex paints. Wait two hours for the primed wood to dry.
Wash the brush with water and place on clean towels to dry.
Coat the primed wood with paint using a roller or the cleaned and dried paintbrush. Use a latex paint on interior wood. Use an acrylic latex paint on exterior wood. Wait two hours for the painted wood to dry.