I really like the "feel" of this piece.. I get a sense of an era. Overall, good job; but I do agree with Ann about the clearance and under-shading bit. I like how clean you kept everything. I know Ann mentioned something about the window.. I think you could either lighten it or let it remain the same. I'm a big fan of contrast, and the window brings it in; you have basically three "fields" of texture here-- the light-colored curve of the sign, the jagged light-grey paint on the truck, and the rigged grid of the window; It all gives it, to me, a sense of rhythm. Nice work.