After teeshirt dried overnight, painted a thin glaze of middle value over the area, thinned with enough medium to see the underpainting through it. The lights and darks will be painted while this layer is wet. Blending is as easy as the alla prima technique (painting wet into wet), which it almost is. Will finish each area of the painting in this way, sometimes repeating layers until it's the way I want it to be. Found out about this technique in Philip Pearlstein's book, THE PAINTING AND TEACHING OF PHILIP PEARLSTEIN.