I was at a Senior Arts Council meeting Monday. My current model was present so it was natural for me to look at her facial features. In the photo I am working from her hair has a slight blond tint. But Monday I realized that there was NO blond in her hair and I had already started putting light yellow on the watercolor paper. (That is what I get for using another person's photo!) I could not resolve how to get the yellow off my paper without using watercolor ground. Even at that it took two coats to cover. I painted one coat a day and had to let each one dry 24 hours.