My way…I do one limb at a time. I run the gun along the limb sweeping a section about 12 inches long just getting it hot. Once it is hot, too hot to touch for long, I slow way down. Put the nozzle close to the limb with it angled forward. As it turns brown, I slowly move forward. Then I do the same on the next 12 inch section. Then I do the same on the other limb. I want it good and dark. Not black, but good and brown. I believe that heating the limb first, gets a deeper treatment than just turning the surface brown.