One technique to improve some in your watercolour

And this is one that I've listen when I was a baby, my parents sometimes didn't have a nanny and carry me to their classes, and is that use the common good quality colouring pencil to do small jewel in a portrait, and when making a portrait with a few white hairs the hair that is more in the prominence, and in the first plane you make, the most visible with a white colour pencil, you choose just a few that make all the meaning or you of an artistic manner create some hair lock and prefer make thin line is this the point make beautiful lines, if large draw lines, that explain all about the white disposition of white hair, don't do many just some, to practice that technique make some exercise before apply in your future paintings, make a finger in a small hand do just the ear with the earring, and also this you make before start the watercolour. Rute Bezerra de Menezes Gondim
Ps.: Also important the pencil for the white hair because white hair in the watercolour could came transparent showing very much the under paint, that will help don't have this situation.