A ba'al t'shuvah (newly observant Jew) house painter was meeting with his Rabbi during the Days of Awe, and wondering how he could correct his previous misdeeds.
"Rebbe, I've done awful things as a painter. I've done sloppy jobs, used inferior quality paints and lied about it. I cut my paints with turpentine, and cut corners. How can I make up for these evil deeds that I've committed in a previous life?"
The Rebbe thought for a while, looked at the painter and then pronounced: "Repaint, Repaint, and thin no more."