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Post pictures and discussions regarding finished models here, please. If you have WIP (work in progress) photos, feel free to post them to the right section and feel free to add the link in your post about the finished work.
I am not sure if I am the right one to give advices, but here's how I do my metallics:
1. several lightly dilluted layers of metalic colour applied on undercoat to have solid metallic surface (I use Vallejo Game Color)
2. applied one or two thin layers of GW washes (Devlan Mud obviously) to reduce matallic shine and lightly define recesses
3. I prepared several 'juices' (very dilluted colours, in fact just coloured water) - some bluish tones, some violet, some brown and started applying in many thin layers (bluish into recesses violet and brown into shades on back of helmet) until it becomes visible
4. final highlights I paint with original metallic colour, for strongest highlights I mix some white into metallic