I recommend two coats, once the boards are Carefully cleaned by using a strain washer and permitted to dry for a few days. Will not wait also prolonged just before painting; the exposed primer breaks down soon after about six months. Around the Coastline: Salt air, superior humidity, and dazzling http://exteriorpaintingcompanych69258.imblogs.net/17780317/paint-hardie-board-trim-fundamentals-explained