Surface Preparation Abrade and clean surfaces thoroughly prior to coating. The surface must be free from all contamination including grease and moisture. Before use, carefully read and note the warning text on the label. Product Type Nitro Combi Coverage 1.56 - 2.19m² per 500ml Drying times Dust Free 5 - 10minutes Touch Dry 10 - 20 minutes Sandable 15 minutes Overcoat ready 15 –30 minutes *The drying time depends on temperature, humidity and the thickness of the applied coa t.