Hammerite Metal Paint - Smooth Finish Abrade smooth surfaces and remove all loose rust and flaking paint with a wire brush. Remove dirt, dust and grease with diluted detergent. Rinse with clean water and allow time to dry. Paint a test patch of Hammerite Direct to Rust Metal Paint Smooth onto painted surfaces and leave for 1 hour. If there is no reaction apply Hammerite Direct to Rust Metal Paint directly to surface. If there is a reaction, remove all paint before applying Hammerite Direct to Rust Metal Paint. On bare zinc, aluminium and galvanised surfaces apply Hammerite Special Metals Primer before applying Hammerite Direct to Rust Metal Paint. Ideal application temperature 8°C to 25°C. Lightly stir before use. Do not mix vigorously. Brush application: Do not thin. On previously painted metal in sound condition, 1 coat should be sufficient. On bare/rusty metal 2 coats are required. Ensure that all edges and corners are adequately covered. Do not over-apply as sagging will occur. Coverage Brush: 4.5 sq m per litre - 2 coats Colour range Black, Blue, Yellow, Silver, Dark Green, Red, Gold, White. Copper.250ml and 750ml.black, Dark Blue, Dark Green, Silver, White, Yellow. 2.5lt only Black, Dark Green, Silver, White, Yellow, 5lt only.