"if one begins to cherish, and like what one's done, one's actually on a very slippery slope indeed..." ~Frank Auerbach
It is not certainty that compels me to rework a painting.
This painting has been handled in surges. I have tried working faster, laying on less and less paint, but the more I attempt to pre-determine outcomes the less connected I feel to the end result. Absurd and outmoded though my approaches seem to me at times, ultimately I rely on instinct and the process either feels genuine or it's abandoned; its subject, its properties and its execution follow no recipe.
ps. Currently working my way through T. Godfrey's Painting Today, Phaidon Press 2009, and highly recommend it.