NOVELTY - The method involves producing a colored aluminum sheet product having predetermined color and predetermined gloss. An intermediate aluminum sheet product is produced. A colored self-cleaning aluminum sheet product is produced by roll coating a self-cleaning coating onto a portion of a barrier layer (40) of the intermediate aluminum sheet product after converting step and converting the self-cleaning coating into a self-cleaning coating layer (30) of a colored self-cleaning substrate (1), where the self-cleaning product retains the color and gloss of the colored sheet product.    USE - Method for producing a self-cleaning substrate as an architectural product e.g. building exterior wall panel such as aluminum composite materials (ACM) wall panel, foam wall panel, rib wall panel, soffit wall panel and flashing wall panel, and post-painted product e.g. roofing product, vinyl siding product, terracotta product and brick product, for metal signage, airplanes, automobiles e.g. cars, lorries and trailers, highway sound barriers and guards and industrial manufacturing venting systems. Can also be used for a food container i.e. aluminum tin, for ceiling panels, doors, furniture and duct work for commercial buildings, and for electronic devices, solar devices, wind powered devices, environmental sensors, battery technology and polymer electronics.    ADVANTAGE - The method enables the self-cleaning coating layer that facilitates self-cleaning, while achieving visual appearance that meets consumer acceptance standards in a cost-efficient manner. The method enables the self-cleaning substrate using a UV light used to clean the wall of pathogens before filling the tin with food or consumable liquid, thus extending shelf life and increasing product safety. The method enables visual detractants to decompose to simple organic or inorganic compounds, which re-enter atmosphere and wash away under effects of ambient conditions, thus making the substrates self-cleaning and providing an easier way to maintain visually appealing surfaces and to clean substrates in absence of detergents and dedicated water spray.    DETAILED DESCRIPTION - The barrier coating is made of silica and titanium dioxide. The self-cleaning coating layer is a transparent layer.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic side view of a portion of a colored self-cleaning substrate.    Colored self-cleaning substrate (1)    Base (10)    Organic layer (20)    Self-cleaning coating layer (30)    Barrier layer (40)