Painting protects surfaces from environmental damage and provides decoration. Paint has a solid base like lead or zinc, a liquid vehicle like linseed oil to carry the base, and additives. Good paint spreads easily, dries quickly, is durable and resistant to fading. There are different types of paints for various surfaces - enamel for exterior/interior walls, emulsion for long-lasting protection, and distemper which is a low-cost water paint. Proper preparation of surfaces like removing old paint, filling cracks, and allowing moisture to dry is important for good adhesion and performance of new paint.