I tried another portrait last night and tried the black ink outline approach. I outlined the initial drawing with Higgins Black Magic Ink and a liner brush, then painted it using my Pelikan watercolors as well as a tiny bit of Higgins white ink as well.
I had trouble with his face in this painting, particularly his lips, and getting the right look of his hairstyle was tricky as well – I don’t think I totally succeeded. Also difficult was the clothing! I’m trying to get the hang of drawing (and painting) folds and shadows on clothing. I think I might try to study up on that a bit.