Mama holding her baby I begin by using resist or mastik to withhold the white areas. I like being able to paint in a more relaxed way putting pools of color up to where the white area edge is. When you look at the image below the yellow is this resist saving my whites.Now I begin putting skin and hair washes in along with the purple chair. Now you can see the yellow mastik reserving the white areas. I just have to remember when I look at it that the yellow areas are actually white.