I painted this painting that I literally abhor and was wondering if I could just simply paint a different painting right on top of it... I was watching an art documentary on Cezanne and the art historian was saying how he painted over a painting he had done of his father... they found this out by using xrays... if you could paint over a finished painting, what about the fat over lean rule? how would it apply? will it crack badly over time? any thoughts?