Hello,

here is my attempt, using a layered texture and an imagefile for the scratches
(similar to what Thomas posted here -
http://news.povray.org/povray.advanced-users/message/%3C5c4970bb%40news.povray.org%3E/#%3C5c4970bb%40news.povray.org%3E
).


material {
        texture {
                pigment {color srgb <0.9284,0.9016,0.8678>}
  normal {
                        average
                        normal_map {
                                [1      bump_map {png "scratches"}
                                        bump_size -1
                                ]
                                [1      bump_map {png "scratches"}
                                        bump_size -1
                                        rotate x*90
                                ]
                                [1      bump_map {png "scratches"}
                                        bump_size -1
                                        rotate z*90
                                ]
                        }
                        accuracy 0.003
                }
                finish {
                        ambient 0
                        diffuse 0.1
                        specular 1
                        roughness 0.0003
                 phong 0.5
                        phong_size 10
                        brilliance 3
                        reflection {0.6, 1 fresnel on metallic}
                        conserve_energy
                }
        }
        texture {
  pigment {color srgbf <0.96,0.965,0.975,0.99/0.8>*0.8}
  finish {
          ambient 0
          diffuse 0.05
          reflection {0, 1 fresnel on}
          conserve_energy
          specular albedo 0.5
                        roughness 0.001
                        brilliance 7
                }
 }
        interior {ior 3.64}
        scale 1
 Reorient_Trans (z, 1)
}

Norbert

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Attachments:
Download 'scratch finish on metallic surfacea.jpg' (684 KB)

Preview of image 'scratch finish on metallic surfacea.jpg'