NOVELTY - A self-cleaning coating composition (paint) (A1) comprises micro-sized particles coated with a functional layer, where the particles are hollow and/or solid beads comprising at least one material selected from ceramic material; polymeric material; cermet material; metallic material; pigmented material; light-absorbing and/or light reflecting material; the layer is covalently bound to the particles, and the photocatalytic layer comprises titanium dioxide in the crystal form of anatase. The coating composition comprises less than 0.1 anatase particles derived/released from the beads.    USE - As self-cleaning coating composition (paint) useful for cleaning a surface; for providing a self-cleaning surface on wood, brick, concrete, cement, asphalt, natural or artificial stone, clay, glass, plastic, metal, fiber glass, carbon fibers, (wall) paper, painted surface, glued surface, and/or composite material, such as a surface on an item, wall, building, structural element, bridge, building element, building block, window, door, floor, ceiling, roof (sheathing), smoothed and/or plastered surface, furniture, house hold equipment, medical equipment, sanitary equipment, car, (motor)bike, truck, container, bus, aircraft, rocket, ship, train, locomotive, wind mill, or solar panel (claimed).    ADVANTAGE - The coating composition (paint) comprises less than 0.1 anatase particles derived/released from the micro-sized beads, determined as weight/weight of released anatase/total amount of anatase. The paint does not contain unbound anatase crystals. The composition provides a painted surface with self-cleaning properties, such as painted surface, which is free of organic and/or inorganic dirt, filth, debris and the like, and provides cleaner appearance. The composition can reduce or avoid e.g. discoloring/staining of the painted surface. The paint composition reduces growth of microorganism, bacterium, mould, yeast, alga, lichen and plant. The paint film inhibits growth of microorganisms, e.g. by killing them on the surface through reaction products derived from the highly oxidative photocatalytic process taking place on the coated beads. The microorganisms will not be able to survive on the surface of a paint film, and thus the microorganisms are prevented from penetrating the paint film and reaching e.g. a substrate, such as a wood substrate, covered by the paint. The lifetime of a coated/painted surface provided with the paint is significantly longer compared to a paint comprising e.g. anatase dispersed in the paint, i.e. non-coupled/conjugated/attached to particles, such as hollow glass microspheres (HGMS). The coated bead improves the abrasion resistance, weather resistance, and the UV stability of the paint film. By covalently bonding photocatalytic material to the beads, the release of nano-sized photocatalytic particles to the environment or paint composition is reduced or avoided. The release of photocatalytically active material to the environment is significantly reduced compared to e.g. paint comprising photocatalytic nano-particles. This is not only because the degradation of the paint film is slowed down, because of the positive effect of the coated beads on the wear and weathering resistance of the paint film, but also because the beads are embedded much deeper in the film and therefore much more paint has to be degraded for the beads to be released than for nano-particles. An improved adhesion can be achieved by creating covalent bonds between the coated beads and the binder or due to high affinity of the binder to the coated beads. This improves the mechanical properties of the paint film, making it more resistant to cracking.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a self-cleaning surface comprising a dried layer (paint film) derived from the self-cleaning paint (A1); and    (2) cleaning a surface involving exposing the self-cleaning surface to electromagnetic radiation, where the electromagnetic radiation comprises radiation with a wavelength of 200-400 nm and/or 400-800 nm, the radiation is provided by the sun (e.g. daylight, reflected sunlight, twilight, moonlight), or by an artificial source.