The idea is to thin the oil paint, so that brush application can begin the painting. If possible use cross hatching and linear lines to express highlights and shadow on my subject. Build an excellent drawing. The finish with drawing is like a woodcut print. Medium used during life study would need to be solvent free and non-toxic. What I am currently experimenting with is 2 part linseed oil and one part marble dust. The key to success is if this medium is not overly smelly and if indeed the marble dust does excellerate the drying time. In addition is the surface overly oily. On a final note, the materials would need to have clean-up when arriving back home.
