Limited studies on the effect of nano TiO2 and conventional TiO2 particles in paints were conducted to establish the effect of salt water, ultraviolet radiation, water and dirt repellency on the paint characteristics. The nano painted surface exhibited some microblistering due to agglomeration and uneven distribution of nanoparticles. Both conventional and nano painted surfaces exhibited an excellent resistance to ultraviolet radiation and salt spray chamber tests. The nano painted surface, however, exhibited a higher degree of dirt repellency and water repellency compared to the conventional painted surface incorporating micro TiO2 particles.