Hammerite Kurust bottle, transforms rust to a sound surface in 15 minutes. Ideal for small areas of rust, stone chips and scratches. No primer or undercoat required and can be top coated after only 3 hours. Simple to apply - no need to rinse off. Kurust can be used for; BBQ, fire surround, garage door, metal doors, garden furniture, gates, railings, radiators. Coverage 20-25 sq m per litre and is re paintable after 3 hours.