Help with tutorial at link below.
 
	https://www.damiensymonds.net/tut_white.html
 
	Here's what I understand from tutorial and images.
 
	 
	You created a levels layer to enhance portrait to satisfaction. 
	Make a rough selection around subject 
	Added another levels layer and used white eydropper to fill selection to white.  
	Then I'm loss.  
	You paint with white brush ... but I do not get how to stop from painting 
	all over the hair.