Metal Polishing Powder "Steel" - Uschi van der Rosten
Metallic powders can be applied using a cotton bud, cloth, brush or airbrush (when thinned).
They can be applied to matt, semigloss or gloss surfaces and each will achieve a different effect.
They can be masked and painted over.
For more tips and examples please watch the video linked below the main photo here. You can also read up on Uschi's website here.