Personally I would recommend not using any! As a makeup artist, I can spot airbrushed pictures a mile off and it doesn't give off the right impression of your work. Also, you are showing future potential clients work which isn't achievable, meaning when you've finished their application they might be disappointed or expect to look a certain way. Skin has texture, and clients need to know your a makeup artist not a miracle worker who can make lines and spots vanish. We can mask them, but there is no real life app for them. I'd personally stay well clear, and concentrate more on getting good images with natural light near a window without photoshop. Xxx