For marking on dark textiles in gold or silver, we suggest you try the edding 750 gloss paint marker or the edding 751 gloss paint marker (it's always best to test the pen in an inconspicuous area first). These gloss paint markers are not designated as textile markers, however, i.e. they don’t produce a wash-resistant result.
For a wash-resistant finish, we offer our edding 4500 textile markers and our edding 4600 textile pens in a wide range of colours; again, these are only suitable for light-coloured fabrics.