Hammerite Kurust converts rusty metal to a clean surface in 15 minutes. It is ideal for small areas of rust, stone chips, and scratches. This rust treatment requires no primer or undercoat and can be topcoated after only 3 hours. It is simple to apply and does not need to be rinsed off. It converts iron oxide to stable iron complexes. Suitable for fire surrounds, garage doors, BBQs, and metal garden furniture. Available in 90ml.