Here I use some sticky tack and a sculpting tool to carefully mask off the area on the miniature I want to paint. Trust me, a little patience goes a long way when you're doing this task.
Then I just apply my paint via my Iwata HP-C. No muss, no fuss.
I carefully peel away the sticky tack and I'm finished.
You'll have to wait a bit to see the finished miniature, I'm afraid.