The main types of exterior paints include acrylic emulsions, elastomeric coatings, mineral silicate paints, and cement paints. Acrylic emulsions are ideal for routine repainting of sound walls, while elastomeric coatings are suitable for fine, non-structural cracks. Mineral silicate paints work well on compatible mineral masonry, and cement paints are best for cementitious surfaces requiring a mineral finish.