Using our Celtic Crest Decals is a breeze. First, clean the surface where you want to apply the decal. Make sure it's dry and free of dust or debris. Then, carefully peel the decal from its backing and place it on the surface. Smooth it out using a credit card or a similar flat object to remove any air bubbles. When it comes to maintenance, you can gently wash the decal with mild soap and water. Avoid using abrasive materials as they might scratch the decal. Also, be careful when applying the decal in extreme temperatures as it may affect the adhesion. If you need to remove the decal, slowly peel it off at an angle, and you can use a little rubbing alcohol to clean any residue left on the surface.