Brush straight from the tin. Two thin coats are preferable to one thick coat. The usual thinning ratio is 2 parts paint to 1 part thinner. 14ml tin covers approx. 0.3m² depending on thickness of application.
The Humbrol No.11 Silver Metallic Finish Enamel Paint 14ml Tinlet would be best suited in projects requiring a smooth, professional-grade metallic finish on surfaces like metal, glass, or plastic.