A high gloss coating on a mineral substrate, such as a roof tile or floor tile, can be achieved by a method comprising: i) applying a first coating consisting of an aqueous composition comprising a film forming polymeric binder to a surface of the uncured substrate; ii) exposing said first coating to hot air or infrared, ultraviolet or microwave radiation, for sufficient time for at least the surface of said coating remote from the substrate body to form a film of polymeric binder, and iii) applying a second coating consisting of an aqueous composition comprising a film forming polymeric binder on top of the first coating. After application of the second coating, the substrate and coatings are dried and cured, for example in an oven or autoclave.