Grab the corner of any loose wallpaper strips and peel away. Scrape off what you can with a paint scraper. The less you need to use the heat gun on, the faster and more smoothly the process will go.
Position the heat gun 2 inches from the wallpaper at a 45-degree angle. Move the heat gun in circles over a small area for best results.
Follow along behind the heat gun and scrape with the paint scraper. The wallpaper should peel away piece by piece. Return to stubborn areas and turn up the heat setting to help release the paper's grip.