Hello Willem, front and back I go along the length of the body, cutaways follow around but I roll the paper around something round to help get into the inside curves (I currently use a round fishing knife sharpener) or piece of dowel. Outside edges and bottom I generally just follow around. However on my last ST-1 I did follow the basswood grain in whatever direction it took (esp. around the bottom edge) and the result was superb, just a few more hours of sanding required.