We all know that we should block in simple shapes and work toward detail, but why is it so difficult to do? It's those darned details that seem to beckon to us and before we know it, we're painting every hair in the sitter's head but missing the solid shape of the skull underneath.
Here's a variation on the old master's technique of lubricating their canvases and laying in softened areas, which they would later sharpen up with detail. Click on the Spray Medium selection at http://studioproducts.com/demo/demo.html
It will open your eyes to a method that works...at least everyone who tries it says it does.
Cennini Catalogue http://studioproducts.com/quickcatal...logframes.html