Have you tried dry brushing? Take a brush and dip it in silver, and
then wipe most of the paint off. You want just some residue still left
in the brush. Then, carefully, lightly drag the brush over the fine
details. This will leave the paint on the high points, and bring them
out. You might want to carefully lay in a dark wash, paint, heavily
thinned out (Shep Paine says it's more like tinted thinner than thinned
paint) to collect in the low points too, to create contrast.