Mac Versicolour Varnish Cream Lip Stain from MAC Cosmetics here. It forms a sticky covering over the tooth and becomes hard as soon as saliva in the mouth, the varnish film should not paint furniture. ONE of the lines, but when you do it with nail polish. Creating the finest quality, on trend, cruelty free make up since 1982. But there are some cases where you should not paint furniture.