Application : Brush or roller or spray. STIR THOROUGHLY BEFORE USE. The normal finishing process is 2 full coats of Dulux Trade Fast Matt. Thinning is not usually required but may be thinned up to 10% if desired under normal conditions, or up to 20% when applying over a porous substrate. For best colour consistency, purchase sufficient tinted paint for each job including touch-in at one time from the same source.