You might be tempted to try to whiten your veneers by yourself with over the counter bleaching products. However, that is inadvisable at best. Veneers do not respond to whitening agents like normal enamel. You might end up whitening your natural teeth while your veneers continue to look the same, resulting in a mismatched smile.
At worst, DIY whitening attempts could damage your veneers or harm your oral health. For example, using an abrasive whitening toothpaste could cause scratches, ultimately worsening the overall aesthetics of your smile. Whitening strips or bleaching trays may irritate your gums or cause increased tooth sensitivity.