I do like pat does, but I do the inter-nodes first, and then nodes, and be careful with them, they are the weak points of the shaft. If they are large, after all is straightened, I then do as Pat does, and then lightly sand them down. I use a heat gun. After the shaft is straight, I cut in the nocks, and arrow head notch, or not if I am using an insert type of head, or slip over type. Be sure to have the stiff side against the bow. I lightly sand the entire shaft, and then spray on a lacquer finish. Then after that has dried, I lightly steel wool it with four 0 steel wool, and then wipe it off, and then spray on another coat of lacquer, and let that dry, and then repeat the steel wool, and then a light coat of paste wax, or you can leave it at that stage, and then fletch. Like they said keep the shaft, or heat source moving, or you will scorch the shaft, and that will weaken it.
Wayne