First, you should do this on a warm/hot day in direct sunlight. The heat will help soften the adhesive, and the direct light will help you see the adhesive. Start by using a scraper to peel up a top corner of decal. Now peel the decal toward yourself. You might need to use the scraper to start the other top corner too. Once the decal is removed, you need to saturate the residual adhesive with the product. The key here is to let it soak for 30 minutes. Every 10 minutes you should apply more remover to keep everything wet. Next, use a scraper to remove the jelly-like dissolved adhesive. Once most of it is gone, wipe the area clean using more product. I then cleaned the whole hood with windex to remove the oil. Then I waxed the hood.