Using these Celtic footer decals is a breeze. First, make sure the surface where you want to apply the decal is clean and dry. Then, carefully peel the decal from its backing and place it on the desired spot. Smooth out any air bubbles with a credit card or a similar flat object. As for care, avoid using abrasive cleaners on the decal. Just a gentle wipe with a soft, damp cloth is enough to keep it looking great. When applying in extreme temperatures, it's best to do it indoors where the temperature is stable. If you want to remove the decal later, slowly peel it off at a low angle to avoid leaving residue.