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Summary: Thinning mediums for an expressionist portrait painting are turpentine and linseed oil. Thin the paint with tips from an artist in this free video on painting.
Andrew Davis received his B.F.A. from the School of Visual Arts in New York. For the past decade, he has been active in New York, Los Angeles and Massachusetts, participating in and...read more
"So this is the mug full of more viscous paint here. There's a fair amount of turpentine and oil mixed in with the paint here. So if you remember from our demonstrations of mark making, this is more thin here, it'll almost drip down there. It will just hang off of the brush. And you can do a nice big area with this. Just put a big swab of paint there. And block in a really large area. You will get some drips most likely, for the fact that the paint's so thin. Let them drip where they will. You can always paint them out later. In fact, you don't even have to keep the canvas oriented the same way. You can turn it sideways at this point, if you want drips to work with you, and you can paint on it this way for a while. And it'll give you good practice on how to look at things sideways and keep that painting fresh. So, thin medium, perfect for large areas."
eHow Article: Expressionist Portrait Painting: Thinning Medium