The National Marker Company sign with the legend âNO SMOKINGâ is often seen in and around residential and commercial buildings. The smoking restriction sign alerts people about areas that prohibit smoking. The sign shows the message in clear, bold font and contrasting colors to ensure clear visibility in most lighting conditions and even from a distance. The material used in this no smoking signage is UV resistant, chemical resistant, graffiti proof and has NMC Sign Muscle coating that protects the text against fading, scratches, scuffing, mold, and moisture.