Purely talking, porcelain veneers, specifically, do not tarnish because porcelain is unsusceptible spots. However, edges of the veneer where it satisfies the tooth can discolor, frequently with unpleasant brownish lines. Though the primary surface of veneers do not discolor as teeth can, scrapes can create that can hold debris resulting in a shady appearance. Lightening toothpaste will certainly not lighten your veneers however can result in great scrapes. Though it can be momentary, veneers stain even more easily when this occurs. Your Houston dentist can polish your veneers to remedy this.