I used a semi-opaque liquitex ink rather than a wash (stronger pigment), took 2-3 passes to get it looking entirely filled. Assuming the consistency of the ink is right it shoud just run in to the detail off the brush, leave it to dry and clean up the surrounding edges with a q-tip and white spirit (the exact chemical you use here will vary on what 'paint' you use). Some use nail polish rather than paint, at which point use an acetone free nail polish remover. Truthfully if I didn't already have all the stuff to do I probably wouldn't have bothered, but it was a decent bordeom cure for all of 10 minutes haha.
I tend to cheat with most of miniature painting and use a combination of an airbrush and enamel washes to make things look like they look me far longer to paint than they actually do, so it was nice to something which required a slightly steady hand for a change.
That’s probably the last miniature I painted (about a year ago I imagine). I have an obsession with glowing details and tinted metallics.