Hammerite Hammered Metal Paint has a gloss finish which will retain its sheen for years. Hammerite can be applied directly onto rusty metal by roller or paint brush, no primer or undercoat are necessary. Hammerite is durable and corrosion resistant decorative coating for ferrous and non-ferrous metal surfaces, certain plastics and wood. Hammerite direct to rust, metal paint can be used for; metal doors, metal garden furniture, metal gates, metal railings etc. Hammerite metal paint offers 8 years of protection. Coverage, 5 sq m per litre, durability, and can be repainted after 4 hours.