Due to the unique formulation of Hammerite paints, brushes and equipment must be cleaned with Hammerite Brush Cleaner and Thinners. As well as cleaning brushes and equipment, it will remove dirt, grime, salt and loose rust from metal surfaces. It can also be used to thin Hammerite paints for spray application and it allows roller application. Hammerite Brush Cleaner and Thinners out-performs white spirit and celulose thinners. Hammerite Thinner & Brush Cleaner 1 Litre HMMTBL1L