Using these Celtic Header Decals is super easy. First, pick a clean and dry surface like your car, boat, truck, or wall. Then, carefully peel the decal from its backing and place it where you want it. Smooth it out with a soft cloth to get rid of any air bubbles. When it comes to choosing the right size and color, think about the overall look you're going for. Make sure to clean the surface before applying the decal for better adhesion. To keep your decal looking great, avoid using harsh chemicals when cleaning the area around it. Just use a mild soap and water. If the decal gets dirty, gently wipe it down. And if you ever want to remove it, do it slowly to avoid any damage to the surface.