Sanded the cowl ramps smooth then used a Bondo type filler to fill in a few low spots and smooth the edges. I countersunk the cowling oil door hinge holes and riveted the hinges to the cowling and the door. Placed the pin through the hinge, installed the oil door Skybolt fasteners, which needed a little adjustment and will probably need a little more later on after everything is painted. I kept the spring out for now.