NOTE: This project, and other advanced projects, are normally offered only to models that I have worked with before and developed a mutual comfort. There are exceptions, for example some traveling models who I'll only work with once. Do not feel like doing these projects is a requirement to work with me. They do require more physical contact then normal shoots.
When covering large parts of the body with solid colors, I have found that the easiest and fastest way to do this is to use a liquid paint and just finger paint it on. Obviously any model involved in this will need to be comfortable being touched and having paint rubbed in whatever areas the project needs to be covered.
I have included an example video.
I have also started using a dry powder based paint for sheer looks (Not shown in the video). This is applied with a brush, finger or other object depending on the desired result, however there is a pre-treatment lotion that makes your skin take the powder, and this is applied with a finger.