Would you dare to sgraffito?

I have been threatening to do this for some time now, and I have jumped in at the very deep end. Oils with a painting knife. I've made a fundamental mistake .. there is no under-painting, but the paint is so thick that I guess I have got away with it on this occasion. Oh, and getting an edge against another colour is a tricky business,  I find myself longing for serendipitous things to happen, but I lack the courage to just throw it all together in a likely mess!! 

Thankfully I have lost the shape that resembles a doofer on the preliminary sketch to the left. I can see why those who labour for hours with traditional media look down on the digital artist. How you achieve spontaneity though with this oily stuff is another thing..

I feel like I'm in exile, but I hope that good things will develop !!!