I have always used a transparentizer from Grumbacher called GEL. Of course, since all major industries are experiencing shortages, why should painting supplies be any different? The original GEL made colors transparent but had no effect on consistency of the paint or drying time. The replacement product may be different. You will need to experiment until you find a product that suits your requirements. For now, I still have some of the original product. In this photo, I mix Titanium white, Flake white and gel. The amount of gel is equal to the amount of the two whites. I apply enough to cover all flesh areas. Then I use an old brush to work it into the canvas pores so that it is well covered. Then I use a strong but soft fan to slowly pick up the excess paint, wiping the brush frequently on paper towels. The grasaille or monotone painting will emerge. Then, using a soft fan or mop brush, I buff this to a high sheen.if you are not experienced and confident, I suggest allowing this to dry before continuing to refine the features.

I just love this stage of a portrait. It is as though we have just been introduced to this person and we are eager to get to know her. I hope I sufficiently express how important a good pose, a good composition is. When the viewers see the painting for the first time, you want them to feel this eagerness to get to know her. People should be drawn to her, not to a painting of a sweet girl, they should want to know THIS girl. That all happens in the composition. If you get good light, that, too, will draw the viewers in. Happy painting.